-

-

2009

681.3.068+800.92C/++ 32.973.26018.1 90

. . 90 /C++ : 2- ., . .

.: -, 2009. 368 .: . + CD-ROM

ISBN 978-5-94157-406-3 -

C/C++, -, , , , , , , . . - C/C++ . - , - . , -- .

681.3.068+800.92C/++ 32.973.26018.1

:

. .

02429 24.07.00. 28.07.09. 60901/16. . . . . 23.

2000 . "-", 190005, -, ., 29.

- 77.99.60.953..005770.05.09 26.05.2009 . .

" ""

199034, -, 9 , 12

ISBN 978-5-94157-406-3 . ., 2009 , "-", 2009

...................................................................................... 1 ....................................................................... 2 ........................................................................ 3

I. ................................................ 5 ................................................................... 7 ........................................................................... 7 .............................................................................................. 8

................................................................ 9 ........................................................................... 9 ............................................................................................ 10

................................................................................................ 14 ......................................................................... 14 ............................................................................................ 15 .................................................................................. 18 ............................................................................................ 18

................................................................................................... 20 ......................................................................... 20 ............................................................................................ 21

............................................... 22 ......................................................................... 22 ............................................................................................ 23

................................................................................................ 39 if ................................................................................ 39

.................................................................. 39 ..................................................................................... 40

IV

switch ........................................................................ 65 .................................................................. 65 ..................................................................................... 66

................................................................................................ 78 for ......................................................................................... 78

.................................................................. 78 ..................................................................................... 78 ......................................................................... 104

do ... while .......................................................................... 110 ................................................................ 110 ................................................................................... 110 ......................................................................... 121

while ................................................................................... 122 ................................................................ 122 ................................................................................... 122

.......................................................................................... 126 ....................................................................... 126 .......................................................................................... 126 ................................................................................ 152

.......................................................................... 160 ....................................................................... 160 .......................................................................................... 161 ................................................................................ 182

.......................................................................................... 188 ....................................................................... 188 .......................................................................................... 188 ................................................................................ 202

........................................................................................... 208 ....................................................................... 208 .......................................................................................... 209 ................................................................................ 248

.............................................................................................. 254 ....................................................................... 254 .......................................................................................... 255 ................................................................................ 269

.......................................................................................... 276 ................................................................................ 283

V

II. ........................................................ 295 ....................................................................297 ..................................................................298 .................................................................................298 .............................................................................298 .......................................................................................298 ..........................................................................................299

...........................................................................................299 .............................................................299 ...............................................................................................300 if ...............................................................................300 switch .......................................................................300

...............................................................................................301 for .............................................................................301 do while ....................................................................301 while .........................................................................302

......................................................................302 - ...................................................................303

printf ..............................................................................................303 scanf ..............................................................................................304 puts ................................................................................................305 gets ................................................................................................305 putch ..............................................................................................305 getch ..............................................................................................306 cputs ..............................................................................................306 cprintf ............................................................................................306 sprintf ............................................................................................307 textcolor .........................................................................................307 textbackground ..............................................................................308 gotoxy ............................................................................................309 clrscr..............................................................................................309 window ..........................................................................................309

...........................................................309 fopen ..............................................................................................309 fprintf .............................................................................................310 fscanf .............................................................................................311

VI

fgets ...............................................................................................311 fputs ...............................................................................................311 ferror .............................................................................................312 feof .................................................................................................312 fclose..............................................................................................312

........................................................312 strcat ..............................................................................................312 strcpy .............................................................................................313 strlen ..............................................................................................313 strcmp ............................................................................................313 strlwr .............................................................................................313 strupr .............................................................................................314 strset ..............................................................................................314 strchr .............................................................................................314

..............................................................314 abs, fabs .........................................................................................314 acos, asin, atan, acosl, asinl, atanl ...............................................315 cos, sin, tan cosl, sinl, tanl ............................................................315 exp, expl .........................................................................................315 pow, powl ......................................................................................316 sqrt .................................................................................................316 rand ...............................................................................................316 srand ..............................................................................................316

...............................................................317 atof .................................................................................................317 atoi, atol ........................................................................................317 gcvt ................................................................................................317 itoa, ltoa, ultoa ..............................................................................318

.....................................................318 arc ..................................................................................................318 bar .................................................................................................319 bar3d .............................................................................................319 circle ..............................................................................................320 drawpoly ........................................................................................321 ellipse ............................................................................................321 getmaxx, getmaxy ..........................................................................322 getx, gety........................................................................................322

VII

graphresult ....................................................................................322 grapherrormsg ..............................................................................322 initgraph ........................................................................................323 line .................................................................................................323 lineto ..............................................................................................323 linerel ............................................................................................324 moveto ...........................................................................................324 moverel ..........................................................................................324 outtext ............................................................................................325 outtextxy ........................................................................................325 pieslice ...........................................................................................325 putpixel ..........................................................................................326 rectangle ........................................................................................326 sector .............................................................................................327 setcolor ..........................................................................................328 setfillstyle.......................................................................................329 setlinestyle .....................................................................................329 settexstyle ......................................................................................330

..............................................................................331 delay ..............................................................................................331 sound .............................................................................................331 nosound .........................................................................................332

........................................................................... 333

1 ................................................................................ 335 ...................................................................... 335 ....................................................... 338 ................................ 339 , ............ 339

2. - ............................... 343 ...................................... 345 ............................................................... 347

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1. , .

1 float a, b; //

float s; //

2. , .

2 float funt; //

float kg; //

3. , - .

3 float summa; //

int srok; // ()

int stavka; // ()

float dohod; //

4. , .

5. , .

5 float r1, r2; //

float s; //

6. , .

9

7. , - , ,

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7 float CenaTetr; //

int KolTetr; //

float CenaKar; //

int KolKar; //

float CenaLin; //

float Summa; //

8. , - , -

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x=x+dx x+=dx, i=i+1 -

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10. , summa .

11. , - n.

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n++;

12. , counter.

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counter -= 2;

13. x1 x2.

14. - = 2,7x3 + 0,23x2 1,4.

14

y:=-2.7*x*x*x + 0.23*x*x - 1.4;

11

15. , - x , dx.

15 x += dx;

16. ( 405,9 ). 16 kg = funt*0.4059;

17. ( 1066,8 ).

18. - .

19. -

: has =21

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h .

20. -

: hbas +=2

, a b ,

h .

21. - : 2rs = .

21 // M_PI, "", math.h

s = M_PI * r * r;

I 12

22. - .

R

H

22 ( )= +

= s r h rv r h

22 // M_PI, "", math.h

s = 2*M_PI*r*(h+r);

v = M_PI *r*r*h;

23. - .

24. -

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R

2

3

443

rs

rv

=

=

24 float r; //

float v, s; //

v = (3*M_PI*r*r*r)/4; // M_PI math.h

s = 4*M_PI*r*r;

13

25. - .

26. - .

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27. - .

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29. - -

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30. -

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31. - , -

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32. - , -

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33. .

34. - ,

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34 float ctetr, cobl, ckar; // ,

int ntetr, nkar; // -

float summ; //

// ,

//

summ = ntetr*(ctetr+cobl) + nkar*ckar;

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printf - .

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y %i ; y %u ; y %f , ; y %n.mf ,

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y \n ; y \t ; y \" ; y \\ \.

printf, puts.

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printf(" ");

getch();

35. , .

I 16

36. , , ( ). 36 #include

#include

void main()

{

printf("\n\n\n");

printf(" ");

getch(); //

}

37. , .

.

! !

,

.

. .

37 //

#include

#include

void main()

{

printf(" ! !\n");

printf(" -\n");

printf(" ,\n");

printf(" .\n\n");

printf(" . . \n");

printf("\n\n ");

getch(); //

}

17

38. a, b c ( float) -. : a = b = = c = .

38 printf("a=%5.3f b=%5.3f =%5.3f", a, b, c);

39. h w ( float), -. -

(=, =), - (). 39 printf(" = %3.2f \n = %3.2f \n", h, l);

40. , - m n (int). 40 printf("a=%i b=%i c=%i", a, b, c);

41. a, b c. -

.

41 printf("a=%i\nb=%i\nc=%i\n", a, b, c);

42. x1 x2. -

, -

, "".

I 18

, cprintf cputs. -

,

\r\n.

, cprintf cputs, - textcolor().

textbackground(). -

.

clrscr, textcolor textbackground, -

#include "conio.h".

43. , :

,

.

,

, .

. .

43 //

#include

void main()

{

textbackground(BLUE); //

textcolor(LIGHTGRAY); //

clrscr(); //

cprintf(" \n\r");

cprintf(" .\n\r");

19

cprintf(" ,\n\r");

cprintf(" , .\n\n\r");

cprintf(" . . \n\n\r");

cprintf("\n\n ");

getch();

}

44. , "- , ", -

( : , , -

, , , -

, ). .

44 //

#include

void main()

{

clrscr();

textcolor(RED);

cprintf(" \n\r");

textcolor(LIGHTRED); //

cprintf(" \n\r");

textcolor(YELLOW);

cprintf(" \n\r");

textcolor(GREEN);

cprintf(" \n\r");

textcolor(LIGHTBLUE);

cprintf(" \n\r");

textcolor(BLUE);

cprintf(" \n\r");

textcolor(MAGENTA);

I 20

cprintf("!\n\r");

textcolor(LIGHTGRAY);

cprintf("\n ");

getch();

}

, ,

:

scanf.

scanf , . -

,

. -

& (, ).

:

y %i ; y %u ; y %f ; y % ; y %s .

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21

45. , - kol .

46. , radius float.

47. , u r ( float). , -

( ). 47 scanf("%f", &u);

scanf("%f", &r);

48. , u r ( float). , .

48 scanf("%f %f", &u, &r);

49. ,

.

49 float r, h; //

float v; //

printf(" :\n");

printf(" -> ");

scanf("%f", &r);

printf(" -> ");

scanf("%f", &h);

I 22

50.

. , -

.

50 float sum; //

int period; // (- )

float rate; //

float profit; //

float value; //

printf(" (.) -> ");

scanf("%f, &sum);

printf(" (.) ->");

scanf("%i", &period);

, ,

:

, , -

.

- , .

23

:

51. . (, , ). : () -> 9 () -> 7.5 : 67.50 . .

51 //

#include

#include

void main()

I 24

{

float l,w; //

float s; //

printf("\n \n");

printf(" :\n");

printf(" (.) -> ");

scanf("%f", &l);

printf(" (.) -> ");

scanf("%f", &w);

s = l * w;

printf(" : %10.2f . \n", s);

printf("\n\n ");

getch();

}

52. .

53. . (, , ). : () -> 9 () -> 7.5 () -> 5 : 337.50 . .

54. -. -

(, , -). : () -> 9 () -> 7.5 () -> 5 : 90.00 . .

25

54 //

#include

#include

void main()

{

float l,w,h; // ,

float s; //

printf("\n \n");

printf(" :\n");

printf(" () -> ");

scanf("%f", &l);

printf(" () -> ");

scanf("%f", &w);

printf(" () -> ");

scanf("%f", &w);

s = (l*w + l*h + w*h)*2;

printf(" : %6.2f . \n",s);

printf("\n\n ");

getch();

}

55. . - (, , ). () -> 9.5 : 857.38 . .

56. . (, - , ). : () -> 5

I 26

() -> 10 1570.80 . .

56 //

#include

#include

void main()

{

float r,h,v; // ,

printf(" \n");

printf(" :\n");

printf(" () -> ");

scanf("%f", &r);

printf(" () -> ");

scanf("%f", &h);

v = 2*3.1415926*r*r*h;

printf("\n %6.2f . \n", v);

printf("\n ");

getch();

}

57. , - .

(, -, ). : (.) -> 2.75 -> 5 (.) -> 0.85 -> 2 : 15.45 .

27

57 //

#include

#include

void main()

{

float kar,tetr; //

int nk,nt; //

float summ; // }

printf("\n \n");

printf(" :\n");

printf(" (.) -> ");

scanf("%f", &tetr);

printf(" -> ");

scanf("%i", &nt);

printf(" (.) -> ");

scanf("%f", &kar);

printf(" -> ");

scanf("%i", &nk);

summ=tetr*nt + kar*nk;

printf("\n : %6.2f .\n", summ);

printf("\n ");

getch();

}

58. , -

.

(, , ). : (.) -> 2.75 (.) -> 0.5 (.) -> 7 : 22.75 .

I 28

59. - ( ), . - (, , ). : (.) -> 8.5 () -> 2.3 : 19.55 .

60. , . -

(, , ). : () -> 8.5 () -> 10 42.50 . .

61. ,

. -

(, , ). ( ) -> 25 17 -> 30 : 106.25 . .

61 //

//

#include

#include

#include "math.h" // sin M_PI - ""

void main()

{

29

float a,b; //

float u; // ,

float s; //

printf("\n \n");

printf(" ");

printf("() -> ");

scanf("%f%f", &a, &b);

printf(" ");

printf("(.) -> ");

scanf("%f", &u);

/* s=a*h/2, a - , h - .

h - h=b*sin(u).

sin .

1 . = 180/pi, pi - "").

*/

s = a*b*sin(u*M_PI/180)/2;

printf(" : %6.2f . ",s);

printf("\n\n ");

getch();

}

62. - , -

.

(, , ). . : () -> 15 () -> 20 : 8.57

62 // ,

// .

I 30

#include

#include

void main()

{

float r1,r2; //

float r; //

printf("\n \n");

printf(" \n");

printf(" :\n");

printf(" () -> ");

scanf("%f",&r1);

printf(" () -> ");

scanf("%f",&r2);

r=r1*r2/(r1+r2);

printf(" : %6.2f ",r);

printf("\n ");

getch();

}

63. - ,

. -

(, , - ). : () -> 15

()-> 27.3 ( ): 42.30

31

64. .

(, , ). : () -> 36 () -> 1500 : 0.024

65. - , . -

(, -, ). : ( ) -> 120 () -> 3.5 420 .

66. -. : (); ( ), 100 ; .

(, , ). () -> 67 ( 100 ) -> 8.5 (.) -> 19.20 109.34 .

66 //

#include

#include

void main()

{

float rast; //

I 32

float potr; // 100

float cena; //

float summ; //

printf("\n \n");

printf(" () -> ");

scanf("%f",&rast);

printf(" ( 100 .) -> ");

scanf("%f",&potr);

printf(" (.) -> ");

scanf("%f",&cena);

summ = 2 * potr/100 * rast * cena;

printf(" %6.2f .",summ);

printf("\n\n ");

getch();

}

67. , , . -

. , , -

.

() -> 1000 (.)-> 3.25 : 1000 : 3 25 = 205 : 17.56 /

67 //

#include

#include

void main()

{

float s; //

float t; //

33

float v; //

int min; //

int sek; //

float ts; //

printf(" \n");

printf(" () -> ");

scanf("%f", &s);

printf(" (.)-> ");

scanf("%f", &t);

min = t;

sek = (t - min) * 100;

ts = min * 60 + sek;

v = (s /1000) / (ts / 3600);

printf(": %4.0f \n", s);

printf(": %i %i = %4.0f \n", min, sek, ts);

printf(" %2.2f /\n", v);

printf("\n ");

getch();

}

68. . (, - , ). : () -> 5.5 () -> 7 665.23 .

69. . -

I 34

(, , -). : () -> 5.5 () -> 7 : 431.97 . .

69 //

#include

#include

#include "math.h" // M_PI - ""

void main()

{

float r; //

float h; //

float s; //

printf("\n \n");

printf(" :\n");

printf(" () ->");

scanf("%f", &r);

printf(" () ->");

scanf("%f", &h);

s = 2*M_PI*r*r +2*M_PI*r*h;

printf(" %6.2f . \n", s);

printf("\n ");

getch();

}

70. . (, , ). ,

35

( ). . -> 7.5 2.5 3 56.25 .

71. - (1 1600,94 ). (, , - ).

-> 100

100 - 160.09

71 //

#include

#include

void main()

{

float m; //

float k; //

printf("\n \n");

printf(" ->");

scanf("%f", &m);

k = m*1.60094;

printf("%6.2f - %6.2f \n", v,k);

printf("\n ");

getch();

}

72. (1 405,9 ). -

I 36

(, , ). -> 5 5 - 2.05

73. . , (% ) ( ) - . -

(, , ). : (.) -> 25000 () -> 6 () -> 10 ------------------------------------- : 1250.00 . : 262500.00 .

73 //

#include

#include

void main()

{

float summ; //

int srok; //

float stavka; //

float dohod; //

printf("\n \n");

printf(" :\n");

printf(" (.) -> ");

scanf("%f", &summ);

printf(" () -> ");

scanf("%i", &srok);

printf(" () -> ");

37

scanf("%f", &stavka);

dohod = summ * stavka/365/100 * srok; // 365 - -

summ = summ + dohod;

printf("----------------------------------\n");

printf(": %9.2f .\n", dohod);

printf(" : %9.2f .\n",summ);

printf("\n ");

getch();

}

74. -, , ,

. -

(, , ). ( )-> 150 150 - 2 . 30 .

74 // , ,

// ,

#include

#include

void main()

{

int min; //

int h; //

int m; //

printf(" ( ) -> ");

scanf("%i",&min);

h = (int)min / 60;

m = min % 60;

I 38

printf("%i . - %i .%i .\n", min, h, m);

printf("\n ");

getch();

}

75. , - . ,

12,5 12 . 50 . (, -, ). -> 23.6 23.6 . - 23 . 60 .

75 //

#include

#include

void main()

{

float f; //

int r; // ()

int k; // ()

printf("\n \n");

printf(" -> ");

scanf("%f",&f);

r = (int)f;

k = f * 100 - r*100;

printf("%6.2f . - %i . %i .\n", f, r, k);

printf("\n ");

getch();

}

39

76. (1 405,9 ). - (, , ). . -> 3.5 3.5 (/) - 1 420 .

77. , -, . -

(, -, ). ( ): x1,y1 -> -2 5 x2,y2 -> 1 7 x3,y3 -> 5 -3 : 23.56 . .

if , , :

if - .

, if, :

1

2

I 40

( ) - , if.

, else, -, , - , -

.

( ) , -

.

- if .

78. - , ,

. -

(, -, ). : () -> 15 ()-> 27.3 (1-, 2- ) -> 2 : 9.68

78 //

#include

#include

void main()

{

float r1,r2; //

float r; //

41

int t; // :

// 1 - ;

// 2 -

printf("\n \n");

printf(" :\n");

printf(" () ->");

scanf("%f", &r1);

printf(" () ->");

scanf("%f", &r2);

printf(" ");

printf("(1-, 2-) ->");

scanf("%i", &t);

if (t == 1)

r = r1 + r2;

else r = r1*r2 / (r1+r2);

printf(" : %6.2f \n", r);

printf("\n ");

getch();

}

79. . : . -. 5000 ., 10%, , 13%. (, , ). , . -> 10000 , . -> 12 ---------------------------- : 10000.00 . : 12 . : 13 : 1300.00 . : 11300.00 .

79 //

#include "stdio.h"

I 42

#include "conio.h"

void main()

{

float sum; //

int period; //

float percent; // ,

float profit; //

float total; //

printf("\n\n");

printf(", . -> ");

scanf("%f",&sum);

printf(" , . -> ");

scanf("%i",&period);

if ( sum < 5000)

percent = 10;

else

percent = 13;

profit = sum * percent/100/12 * period;

total = sum + profit;

printf("\n: %3.2f .", sum);

printf("\n : %i .", period);

printf("\n : %2.2f", percent);

printf("\n: %3.2f .", profit);

printf("\n : %3.2f .", total);

printf("\n\n ");

getch();

}

43

80. . : . -. 5000 ., 9%, 5000 ., 10 000 ., 11%, 10 000, 13%. (-, , ). , . -> 15000 , . -> 6 --------------------------- : 15000.00 . : 6 . : 13.00 : 975.00 . : 15975.00 .

80 //

#include "stdio.h"

#include "conio.h"

void main()

{

float sum; //

int period; //

float percent; //

float profit; //

float total; //

printf("\n\n");

printf(", . -> ");

scanf("%f",&sum);

printf(", . -> ");

I 44

scanf("%i",&period);

if ( sum < 5000)

percent = 9;

else

if ( sum < 10000)

percent = 11;

else

percent = 13;

profit = sum * percent/100/12 * period;

total = sum + profit;

printf("\n---------------------------");

printf("\n: %3.2f .", sum);

printf("\n: %i", period);

printf("\n: %3.2f", percent);

printf("\n: %3.2f .", profit);

printf("\n : %3.2f .", total);

printf("\n\n ");

getch();

}

81. -. 912 1015. - 10, 5%. (, , ). (1 912; 2 1015) > 2 , . -> 15 ---------------------------- : 3.20 . : 15 . : 48.00 . : 2.40 . : 45.60 .

45

81 // -

//

#include "stdio.h"

#include "conio.h"

void main()

{

int format; // : 1 - 912; 2 - 1015

int kol; //

float cena; //

float sum; //

float discount = 0; //

float total; //

printf("\n\n");

printf(" (1 - 9x12; 2 - 10x15) -> ");

scanf("%i",&format);

printf(", . -> ");

scanf("%i",&kol);

if ( format == 1 )

cena = 2.50;

else

cena = 3.20;

sum = cena * kol;

if ( kol > 10 )

I 46

{

discount = sum * 0.05;

total = sum - discount;

}

printf("\n-------------------------");

printf("\n: %3.2f .", cena);

printf("\n: %i", kol);

printf("\n: %3.2f .", sum);

if ( discount != 0)

{

printf("\n: %3.2f .", discount);

printf("\n : %3.2f .", total);

}

printf("\n\n ");

getch();

}

82. , , - (I = P/U, : I , ; P , ; U , ). - ,

( ), -. (-, , ). , -> 60 , -> 0 ! .

82 //

#include

47

#include

void main()

{

float P,U,I; // , ,

printf("\n \n");

printf(", -> ");

scanf("%f", &P);

printf(", -> ");

scanf("%f", &U);

if (U != 0)

{

I = P / U;

printf(" : %5.2f , I);

}

else

printf("! !\n");

printf("\n ");

getch();

}

83. . . -

(, , ). : () -> 3.5 () -> 7 !

83 //

#include

I 48

#include

void main()

{

float r1,r2; //

float s; //

printf("\n :\n");

printf(" () -> ");

scanf("%f",&r1);

printf(" () -> ");

scanf("%f",&r2);

if (r1 > r2)

{

s = 2 * 3.14 * (r1 - r2);

printf("\n %6.2f .\n", s);

}

else

{

printf("\n! ");

printf(" .\n");

}

printf("\n ");

getch();

}

84. , - . -

, ,

. -

. ,

, .

(.) -> 2.90 ! 60

84 //

#include

49

#include

void main()

{

float t; // , 1.25

int ts; //

int min; //

int sek; //

printf(" (.) -> ");

scanf("%f", &t);

min = t; // t float, - ""

sek = (t - min) * 100;

if (sek > 60)

{

printf("!");

printf(" 60");

}

else

{

ts = min * 60 + sek;

printf("%i %i = %i ", min, sek, ts);

}

printf("\n ");

getch();

}

85. , , -. -

. , , .

, 2000, ->2001 2000

85 // ,

#include

#include

I 50

void main()

{

int year;

int r; // year 4

printf(" , 2001, ");

printf("->");

scanf("%i", &year);

r = year % 4;

if ( r )

printf("%i - \n", year);

else

printf("%i - \n", year);

printf("\n ");

getch();

}

86. . -

, -

, . -

(, , ). -> 12 27 -10 : x1= -25.551 x2= -28.449

86 //

#include

#include

#include "math.h"

void main()

{

51

float a,b,c; //

float x1,x2; //

float d; //

printf("\n \n");

printf(" ");

printf(" ");

printf("-> ");

scanf("%f%f%f", &a, &b, &c); //

d = b*b - 4*a*c; //

if (d < 0)

printf(" \n");

else {

x1 = (-b + sqrt(d))/(2*a);

x2 = (-b - sqrt(d))/(2*a);

printf(" : x1=%3.2f x2=%3.2f\n", x1, x2);

}

printf("\n ");

getch();

}

87. . 10% , 1000 . (, , -). -> 1200 10% : 1080.00 .

88. . 3% , 500 , 5% 1000 . -

I 52

(, , ). -> 640 3% : 620.80 .

88 //

#include

#include

void main()

{

float summ; //

printf("\n \n");

printf(" ");

printf("-> ");

scanf("%f", &summ);

if (summ < 500)

printf(" .\n");

else {

printf(" ");

if (summ > 1000) {

printf("5%\n");

summ = 0.97 * summ;

}

else {

printf("3%\n");

summ = 0.97 * summ;

};

printf(" : %3.2f .\n", summ);

}

printf("\n ");

getch();

}

53

89. -. , -

.

(, -, ). -? -> 1705 , - 1703

89 //

#include

#include

void main()

{

int year; //

printf("\n -?\n");

printf(" ");

printf("-> ");

scanf("%i", &year);

if (year == 1703)

printf(".");

else {

printf(" , ");

printf("- 1703 .\n");

}

printf("\n ");

getch();

}

90. . ,

.

I 54

(, -, ). ? -> 1939

91. . . -

.

(, , ). : 1. 2. 3. -> 3 . -

91 //

#include

#include

void main()

{

int otv; //

printf(" :\n");

printf("1. \n");

printf("2. \n");

printf("3. \n");

printf(" ");

printf("-> ");

scanf("%i", &otv);

55

if (otv == 2)

printf(".");

else {

printf(" .\n ");

printf(" \n");

}

printf("\n ");

getch();

}

92. . . -

.

(, , ). : 1. , - 2. - 3. -> 1 . : 2

93. , . ,

, , , -

. .

-> 34 67

34 67

93 //

#include

#include

void main()

I 56

{

int a,b; //

printf("\n ");

printf(" ");

printf("->");

scanf("%i%i", &a, &b);

if (a == b)

printf(" ");

else if (a < b)

printf("%i %i\n", a, b);

else printf("%i %i\n", a, b);

printf("\n ");

getch();

}

94. , , , -

"!" " -" .

(, , - ). 67 ? -> 56 . 67=42

94 //

#include

#include

#include // srand

#include // time

void main()

{

int m1, m2, p; //

57

int otv; //

time_t t; // -

//

srand((unsigned) time(&t));; //

//

m1 = rand() % 9 +1; // rand() 9

// 0 8

m2 = rand() % 9 +1;

p = m1 * m2;

printf(" %ix%i ?\n", m1, m2);

printf(" ");

printf("-> ");

scanf("%i", &otv);

if (p == otv)

printf(".");

else

printf(" .\n%ix%i=%i", m1, m2, p);

printf("\n ");

getch();

}

95. , ( 100), , "!" " " - .

(, , -). 83-17 ? -> 67 . 83-17=66

96. , , - . -

I 58

(, -, ). -> 23 23 - .

96 //

#include

#include

void main()

{

int n; //

printf("\n ");

printf("-> ");

scanf("%i", &n);

printf(" %i ");

if (n % 2 == 0)

printf(".");

else

printf(".");

printf("\n\n ");

getch();

}

97. , , . -

(, -, ). -> 451 451

98. - 20%- ,

59

.

(, , -). : ( ) -> 3 (1 - , ... 7 - ) -> 6 20%. : 5.52 .

98 //

// ,

#include

#include

void main()

{

int time; //

int day; //

float summa; //

printf("\n \n");

printf(" :\n");

printf(" ");

printf("( - ) ->");

scanf("%i", &time);

printf(" ");

printf(" (1-,..,7-) ->");

scanf("%i", &day);

summa = 2.3 * time; // 2.3 .

if (day == 6 || day == 7)

{

printf(" 20%\n");

summa = summa * 0.8;

};

I 60

printf(" : %3.2f .\n",summa);

printf("\n ");

getch();

}

99. , ,

.

: () 100. (, -, ). () () ->170 68 2.00 .

99 //

#include

#include

void main()

{

float w; //

float h; //

float opt; //

float d; //

printf("\ , ,\n");

printf(" () (), ");

printf("->");

scanf("%f%f", &h, &w);

opt = h - 100;

if (w == opt)

printf(" !");

else

61

if (w < opt)

{

d = opt - w;

printf(" %2.2f .\n", d);

}

else

{

d = w - opt;

printf(" %2.2f .\n", d);

}

printf("\n ");

getch();

}

100. , -

. , -

" ".

.

( 1 12) -> 11

100 //

#include

#include

void main()

{

int month; //

puts("\n ( 1 12)");

printf("-> ");

scanf("%i", &month);

if (month < 1 && month > 12)

I 62

printf(" 1 12");

else if (month >= 3 && month = 6 && month = 9 && month

63

if (n > 100)

r = n % 100;

else r = n;

// r -

if ( r >= 11 && r = 2 && r 31 12 2008 ! ! 1.1.2009

104 //

#include

#include

I 64

void main()

{

int day;

int month;

int year;

int last; // 1,

int r; // ,

// year 4

printf(" () ");

printf(" \n");

printf("( ) -> ");

scanf("%i%i%i", &day, &month, &year);

last = 0;

if (month == 2) {

if ((year % 4) != 0 && day == 28) last = 1;

if ((year % 4) == 0 && day == 29) last = 1;

}

else if ((month == 4 || month == 6 ||

month == 9 || month == 11)

&& (day == 31))

last = 1;

else if (day == 31)

last = 1;

if (last == 1) {

printf(" !\n");

day = 1;

if (month == 12) {

month = 1;

year++;

printf(" !\n");

}

else month++;

65

}

else day++;

printf(" %i %i %i",day,month,year);

printf("\n ");

getch();

}

switch , , :

switch - .

, switch, :

1 2 3 d

n1

n3

n2 default

- ,

case.

- , case, -

, default.

- - .

I 66

105. , -. : ( , ) (, , ). (, , ). () > 75 () > 150 : 1 2 3 > 3 ----------------------------- . : 350.00 . : 1.13 . . : 393.75 .

105 // -

//

#include "stdio.h"

#include "conio.h"

void main()

{

float w,h; // ,

int m; // :

// 1 - ; 2 - ; 3 - ;

float cena; // 1 . .

float s; //

float sum; //

printf("\n\n");

printf("\n (.) -> ");

67

scanf("%f",&w);

printf(" () -> ");

scanf("%f",&h);

printf(":\n");

printf("1 - \n");

printf("2 - \n");

printf("3 - \n");

printf(" ->");

scanf("%i",&m);

switch ( m )

{

case 1: cena = 200; break;

case 2: cena = 250; break;

case 3: cena = 350; break;

default: cena = 0; break;

}

if ( cena != 0 )

{

s = (w * h) / 10000;

sum = s * cena;

printf("\n . : %3.2f .", cena);

printf("\n: %3.2f . ", s);

printf("\n : %3.2f .", sum);

}

else

printf("\n ");

printf("\n\n ");

getch();

}

I 68

106. , - . :

(912, 1015 1824) . - 10, 10%. (, , ). : 1 912 2 1015 3 1824 > 1 > 12 ----------------------------- : 3.50 . : 12 . : 42.00 . : 4.20 . : 37.80 .

106 // -

#include "stdio.h"

#include "conio.h"

void main()

{

int k; //

int f; // : 1 - 912; 2 - 1215; 3 - 1824

float cena; // 1 .

float sum; //

float discount; //

float itog;

printf("\n\n");

printf(":\n");

printf("1 - 912\n");

69

printf("2 - 1215\n");

printf("3 - 1824\n");

printf(" ->");

scanf("%i",&f);

switch ( f )

{

case 1: cena = 3.50; break;

case 2: cena = 5.00; break;

case 3: cena = 8.50; break;

default: cena = 0; break;

}

printf(" (.) -> ");

scanf("%i",&k);

if ( cena != 0 )

{

sum = k * cena;

printf("\n .: %3.2f .", cena);

printf("\n: %i .", k);

if ( k > 10 )

{

discount = sum * 0.1;

itog = sum - discount;

printf("\n: %3.2f .",sum);

printf("\n: %3.2f .", discount);

printf("\n : %3.2f .",itog);

}

else

I 70

printf("\n : %3.2f .", sum);

}

else

printf("\n ");

printf("\n\n ");

getch();

}

107. , - . : (- 92, 95, 98 ) . (, - , ). : 1 92 2 95 3 98 4 DT > 2 > 25 ----------------------------- : 20.30 . : 25 : 507.50 .

107 // -

#include "stdio.h"

#include "conio.h"

void main()

{

int m; // : 1 - 92; 2 - 95; 3 - 98; 4 - DT

float cena; // 1

float litr; //

float sum; //

71

printf("\n\n");

printf(" :\n");

printf("1 - 92\n");

printf("2 - 95\n");

printf("3 - 98\n");

printf("3 - DT\n");

printf(" ->");

scanf("%i",&m);

switch ( m )

{

case 1: cena = 17.50; break;

case 2: cena = 20.30; break;

case 3: cena = 25.40; break;

case 4: cena = 18.50; break;

default: cena = 0; break;

}

printf(" -> ");

scanf("%f",&litr);

if ( cena != 0 )

{

sum = litr * cena;

printf("\n : %3.2f .", cena);

printf("\n: %3.2f", litr);

printf("\n : %3.2f .", sum);

}

else

printf("\n ");

printf("\n\n ");

getch();

}

I 72

108. , .

,

.

108 //

#include

#include

void main()

{

int nd; //

puts("\n (1..7");

printf("->");

scanf("%i", &nd);

switch (nd)

{

case 1: puts(""); break;

case 2: puts(""); break;

case 3: puts(""); break;

case 4: puts(""); break;

case 5: puts(""); break;

case 6: puts(""); break;

case 7: puts(""); break; default: puts(" 1..7");

}

getch();

}

109. , . :

3 . 6 . 12 . 18 . 24 . 36 . 9,0% 11,5% 13,5% 15,0% 18,0% 24,0%

73

109 //

#include "stdio.h"

#include "conio.h"

void main()

{

float value;

int period;

float rate;

float profit;

printf("value->");

scanf("%f",&value);

printf("period->");

scanf("%i",&period);

switch ( period )

{

case 3: rate=9.0; break;

case 6: rate=11.5; break;

case 12: rate=13.5; break;

case 18: rate=15.0; break;

case 24: rate=18.0; break;

case 36: rate=24; break;

default: period = 0;

}

if ( period !=0 )

{

printf("\nrate: %6.2f", rate );

profit = value * rate/100/12 * period;

I 74

printf("\nprofit: %6.2f", profit);

}

else

printf("Not valid period");

printf("");

getch();

}

110. , - ( , ). : . ,

(, , ). (.) 423 2,2

495 1,0

815 1,2

846 1,4 : -> 423 ()-> 3 : : 2.20 . : 6.60 .

110 //

//

#include

#include

void main()

75

{

int kod; //

float cena; //

int dlit; //

float summ; //

printf("\n .\n");

printf(" :\n");

printf(" ( - ) ->");

scanf("%i", &dlit);

puts(" ");

puts("\t432");

puts("\t\t495");

puts("\t815");

puts("\t\t846");

printf("->");

scanf("%i", &kod);

printf(": ");

switch (kod)

{

case 432: puts("");

cena = 2.2;

break;

case 495: puts("");

cena = 1;

break;

case 815: puts("");

cena = 1.2;

break;

case 846: puts("");

cena = 1.4;

break;

default: printf(" .");

cena = 0;

I 76

}

if (cena != 0) {

summ = cena * dlit;

printf(" : %i .\n", cena);

printf(" : %3.2f .\n", summ);

}

printf("\n ");

getch();

}

111. , - . -

: ( ( ) ) modd m Y Y c c+ + +

+

+

15 13 1 4 4 2 777 7

.

d , m , , ( 1, 2, ..., 12), Y , c -. ,

.

: 1 , 2 , ..., 6 , 0 . 111 //

#include

#include

void main()

{

int day,month,year; // , ,

int c,y; //

int m; //

int d; //

puts("\n ");

77

puts(" : .");

puts(", 5 12 2001");

printf("->");

scanf("%i %i %i", &day, &month, &year);

if (month == 1 || month == 2)

year--; //

//

m = month - 2; //

if (m

I 78

for , , :

for - .

, for, :

K-

- - .

- .

112. , 10 .

113. , y = 2,4x2 + 5x 3 2 2, 0,5. .

--------------- x | y --------------- -2 | -22.60 -1.5 | -15.90 -1 | -10.40

79

-0.5 | -6.10 0 | -3.00 0.5 | -1.10 1 | -0.40 1.5 | -0.90 2 | -2.60 ----------------

113 //

#include

#include

#define LB -2.0 //

#define HB 2.0 //

#define DX 0.5 //

void main()

{

float x,y; //

int n; // -

int i; //

n = (HB - LB)/DX +1;

x = LB;

printf("------------------\n");

printf(" x | y\n");

printf("------------------\n");

for (i = 1; i

I 80

114. , . -

.

-------------- -------------- 1 1 2 4 3 9 4 16 5 25 6 36 7 49 8 64 9 81 10 100 --------------

114 //

#include

#include

void main()

{

int x = 1; //

int y; //

int i; //

printf(" \n");

printf("-----------------\n");

printf("\t\n");

printf("-----------------\n");

for (i = 1; i

81

printf("-----------------\n");

printf("\n ");

getch();

}

115. , . -

.

. -------------- -------------- 1 1 3 9 5 25 7 49 9 81 --------------

116. , ( 0,5 ) (v = gt, g = 9,8 /2 ). .

------------------------- , , / ------------------------- 0.0 0.00 0.5 4.90 1.0 9.80 1.5 14.70 2.0 19.60 2.5 24.50 3.0 29.40 -------------------------

117. , - . : , . ,

() . . -

.

C (.) -> 150000 (.) -> 12 () -> 14

I 82

----------------------------------- ----------------------------------- 1 150000.00 1750.00 14250.00 2 137500.00 1604.17 14104.17 3 125000.00 1458.33 13958.33 4 112500.00 1312.50 13812.50 5 100000.00 1166.67 13666.67 6 87500.00 1020.83 13520.83 7 75000.00 875.00 13375.00 8 62500.00 729.17 13229.17 9 50000.00 583.33 13083.33 10 37500.00 437.50 12937.50 11 25000.00 291.67 12791.67 12 12500.00 145.83 12645.83 ----------------------------------- : 11375.00

117 //

#include "stdio.h"

#include "conio.h"

void main()

{

float value; //

int period; //

float rate; //

float debt; // ,

float interest; // ( )

float paying; //

float suminterest; //

printf(", .,-> ");

scanf("%f",&value);

printf(", .,-> ");

scanf("%i",&period);

printf(" , -> ");

83

scanf("%f",&rate);

debt = value;

suminterest = 0;

printf("-----------------------\n");

printf(" \n");

printf("-----------------------\n");

for ( int i = 1; i 0 t2 > 10 dt> 1 ----------------- C F ----------------- 0.00 32.00 1.00 33.80 2.00 35.60 3.00 37.40

I 84

4.00 39.20 5.00 41.00 6.00 42.80 7.00 44.60 8.00 46.40 9.00 48.20 10.00 50.00 -----------------

118 //

//

#include "stdio.h"

#include "conio.h"

void main()

{

float t1,t2,dt; //

float c,f; //

int n; //

printf("t1->");

scanf("%f",&t1);

printf("t2->");

scanf("%f",&t2);

printf("dt->");

scanf("%f",&dt);

n = (t2 - t1)/dt + 1;

c = t1;

printf("\n----------------\n");

printf("\n C F\n");

printf("\n----------------\n");

for (int i=0; i

85

f = (float)9/5 * c + 32;

printf("%5.2f %5.2f\n", c,f);

c = c + dt;

}

printf("\n----------------\n");

printf("\n \n");

getch();

}

119. , - (1 = 2,54 ). -

.

120. , n .

.

(, , ). -> 20 20 210

120 // n

#include

#include

void main()

{

int n; // -

int summ; //

int i; //

printf(" \n");

printf(" -> ");

I 86

scanf("%i", &n);

summ = 0;

for (i = 1; i 12 12 156

122. , n : 1, 3, 5, 7 ... . -

(, -, ). : 1,3,5,7, ...

->15 15 330

122 // : 1,3,6,9 ...

#include

#include

void main()

{

int e; //

87

int n; // -

int summ = 0; //

int i; //

printf(" : 1,3,6,9, ...\n");

printf(" -> ");

scanf("%i", &n);

e = 1;

for (i = 1; i 15

15 3.3182

123 // 1+1/2+1/3+ ...

#include

#include

void main()

{

I 88

int n; // -

float i; // ; int,

// 1/i

//

float elem; //

float summ = 0 ; //

printf(" 1+1/2+1/3+...\n");

printf(" - \n");

printf("-> ");

scanf("%i",&n);

summ = 0;

for (i = 1; i

89

124 //

#include

#include

void main()

{

int n; //

int x; // 2 n

printf("\n \n");

x = 1;

for (n = 0; n 7 7 5040

126. , . -

. , -

, .

. -> 5.4 -> 7.8

I 90

-> 3.0 -> 1.5 -> 2.3 : 4.00

127. , - -

. -

. .

. -> 5 . -> 5.4 -> 7.8 -> 3.0 -> 1.5 -> 2.3 : 4.00

128. , -

-

. .

-> 12.3 : 1 : 12.30 . .: 12.30 -> 15 : 2 : 27.30 . .: 13.65 -> 10 : 3 : 37.30 . .: 12.43 -> 5.6 : 4 : 42.90 . .: 10.73 -> 11.5 : 5 : 54.40 . .: 10.88

128 // , -

#include

91

#include

#define L 5 //

void main()

{

float a; //

int n; // -

float sum; //

float sred; //

printf("\n \n");

printf(" ");

sum = 0;

for (n = 1; n

I 92

. , ,

.

. -> 5 . -> 5.4 -> 7.8 -> 3.0 -> 1.5 -> 2.3 : 5 : 4.00 : 1.5 : 7.8

129 //

//

// ,

#include

#include

void main()

{

float a; //

int n; //

float sum; //

float sred; //

float min; //

float max; //

int i; //

printf(" .\n");

printf(" ->");

scanf("%i", &n);

printf(" .\n");

printf(" ");

printf("->");

93

scanf("%f",&a); //

// , :

min = a; //

max = a; //

sum = a;

//

for (i = 1; i < n; i++)

{

printf("->");

scanf("%f", &a);

sum += a;

if (a < min) min = a;

if (a > max) max = a;

}

sred = sum / n;

printf(" : %i\n", n);

printf(" : %6.2f\n", sred);

printf(" : %6.2f\n", min);

printf(" : %6.2f\n", max);

printf("\n ");

getch();

}

130. , - 10 ( 1 10), . -

.

1 3 4 2 7 4 9 6 2 1 . .: 3.90

I 94

131. , - ( 1 10).

.

.

6 10 4 2 5 8 1 7 7 3 . .: 5.30 10 3 6 1 10 1 3 8 7 6 . .: 5.50 5 2 2 5 4 2 2 1 6 10 . .: 3.90

131 //

//

#include

#include

#include // srand rand

#include

#define L 10 //

#define N 3 //

void main()

{

int r; //

int sum; // summa

float sred; //

int i,j; //

time_t t; // -

//

srand((unsigned) time(&t));; // //

for (i = 1; i

95

sum = 0; // !

for (j = 1; j 16.50 , . , . 100 1.65 200 3.30 300 4.95 400 6.60 500 8.25 600 9.90 700 11.55 800 13.20 900 14.85 1000 16.50

133. , y = | x |. 4 4, 0,5.

I 96

133 // y=|x|

#include

#include

#include "math.h"

#define LB -4 // -

#define HB 4 // -

#define DX 0.5 //

void main()

{

float x,y; //

int n; // -

int i; //

printf("\n y=|x| \n");

n = (HB - LB)/DX + 1;

x = LB;

for (i = 1; i

97

135. , -, , 7. .

72=14 73=21 74=28 75=35 76=42 77=49 78=56 79=63

135 // 7

#include

#include

void main()

{

int m; // ,

// ()

int n; //

int p; //

m = 7;

printf("\n %i\n", m);

for (n = 1; n

I 98

136. , - . -

.

1 2 3 4 5 6 7 8 9 10 1 1 2 3 4 5 6 7 8 9 10 2 2 4 6 8 10 12 14 16 18 20 3 3 6 9 12 15 18 21 24 27 30 4 4 8 12 16 20 24 28 32 36 40 5 5 10 15 20 25 30 35 40 45 50 6 6 12 18 24 30 36 42 48 54 60 7 7 14 21 28 35 42 49 56 63 70 8 8 16 24 32 40 48 56 64 72 80 9 9 18 27 36 45 54 63 72 81 90

136 // -

#include

#include

void main()

{

int i,j; //

printf(" "); //

for (j = 1; j

99

137. , : 1 1/3 + 1/5 1/7 + 1/9 /4 ( , /4). 137 // ""

// 1 -1/3 + 1/5 - 1/7 + ...

#include

#include

void main()

{

float x; //

int n; //

float summ; //

int i; //

// (~1000)

// , ""/4

printf(" 1 -1/3 + 1/5 - 1/7 + ...\n");

printf(" - ->" );

scanf("%i", &n);

summ = 0;

for (i = 1; i

I 100

138. f(x) = 5x2 x + 2 . x1, x2 x .

x1 x2x

138 //

// ( for)

#include

#include

void main()

{

float a,b; //

float dx; //

float s; //

int n; //

float x; //

float y; //

int i;

printf("\ \n");

printf(" -> ");

scanf("%f", &a);

printf(" -> ");

scanf("%f", &b);

printf(" -> ");

101

scanf("%f", &dx);

n = (b - a) / dx + 1;

x = a;

s = 0;

for (i = 1; i

I 102

float a,b; //

float dx; //

float s; //

int n; //

float x; //

float y1,y2; //

int i;

printf("\n \n");

printf(" \n");

printf(" -> ");

scanf("%f", &a);

printf(" -> ");

scanf("%f", &b);

printf(" -> ");

scanf("%f", &dx);

n = (b - a) / dx;

x = a;

s = 0;

for (i = 1; i

103

. -

.

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

141. , - . -

.

0 255

->49

49 00110001

141 //

#include

#include

void main()

{

int dec; //

int v; //

int i; //

printf("\n \n");

printf(" 0 255 ");

printf("-> ");

scanf("%i", &dec);

printf(" %i ", dec);

v = 128; // ()

for (i = 1; i

I 104

{

if (dec >= v)

{

printf("1");

dec -= v;

}

else printf("0");

v = v / 2; //

}

printf("\n\n ");

getch();

}

142. . 10 : 10 "", 9 8 "", 7 6 "", 6 "-". . -

.

*** *** . 5x3=15 77=49 14=4 43=12 94=36 88=64 78=52 ! 78=56 47=28 35=15 25=10 : 9 : .

142 //

#include

105

#include

#include // srand rand

#include

void main()

{

int numb1,numb2; //

int res; //

int otv; //

int kol = 0; //

int i; //

time_t t; // -

//

printf("\*** ***\n");

printf(" ");

srand((unsigned) time(&t));; // //

for (i = 1; i

I 106

{

case 10: puts("5"); break;

case 9: puts("4"); break;

case 8: puts("4"); break;

case 7: puts("3"); break;

default: puts("2"); break;

}

printf("\n ");

getch();

}

143. 100. 10 ,

, . .

.

: 10 "", 9 8 "", 7 6 "", 6 - "". -

. .

. 75-4=71 35-9=29 ! 35-9=26 14-1=13 6-5=1 37-19=28 ! 37-19=18 53-14=39 94-87=7 90-16=74 4-2=2 89-41=48 : 8 :

143 //

#include

#include

107

#include // srand rand

#include

#define LEVEL 97+2 // 2 99

void main()

{

int numb1,numb2; //

int op; // :

// 0 - , 1 -

char zop; // - "" ""

int res; //

int otv; //

int kol = 0; //

int buf; // numb1 numb2,

// numb1

I 108

{

res = numb1 + numb2;

zop = '+';

}

else

{ //

zop = '-';

if (numb1 < numb2)

{

// numb1 numb2

buf = numb2;

numb2 = numb1;

numb1 = buf;

}

res = numb1 - numb2;

}

printf("%i%c%i=", numb1, zop, numb2); //

scanf("%i", &otv); //

if (otv == res)

kol++;

else printf(" . %i%c%i=%i\n",

numb1, zop, numb2, res);

}

printf(" : %i\n", kol);

printf(" :\n");

switch (kol)

{

case 10: puts("5"); break;

case 9: puts("4"); break;

case 8: puts("4"); break;

case 7: puts("3"); break;

default: puts("2"); break;

}

109

printf("\n ");

getch();

}

144. , "- ", , ,

, .

144 //

#include

#include

#include "dos.h" // delay

void main()

{

int min,sec; // ,

clrscr(); //

_setcursortype(_NOCURSOR); //

printf(" , ");

for (min = 0; min

I 110

do ... while , ,

:

do while , . . ( do while) .

, do while, :

while - .

do while .

do while , -

.

do while, , ,

, .

145. , - y = 2,4x2 + 5x 3.

111

.

.

x1 -> -2 x2 -> 2 dx -> 0.5 --------------- x | y --------------- -2 | -22.60 -1.5 | -15.90 -1 | -10.40 -0.5 | -6.10 0 | -3.00 0.5 | -1.10 1 | -0.40 1.5 | -0.90 2 | -2.60 ----------------

145 //

#include

#include

void main()

{

float x,y; //

float x1,x2,dx; //

printf("x1 -> ");

scanf("%f",&x1);

printf("x2 -> ");

scanf("%f",&x2);

printf("dx -> ");

scanf("%f",&dx);

x = x1;

I 112

printf("------------------\n");

printf(" x | y\n");

printf("------------------\n");

do

{

y = -2.4*x*x+5*x-3;

printf("%6.2f | %6.2f\n" ,x ,y);

x += dx;

}

while ( x 0 t2 > 10 dt> 1 ----------------- C F ----------------- 0.00 32.00 1.00 33.80 2.00 35.60 3.00 37.40 4.00 39.20 5.00 41.00 6.00 42.80 7.00 44.60 8.00 46.40 9.00 48.20 10.00 50.00 -----------------

113

146 //

//

#include "stdio.h"

#include "conio.h"

void main()

{

float t1,t2,dt;

float c,f;

printf("\n ");

printf("\n \n");

printf("t1->");

scanf("%f",&t1);

printf("t2->");

scanf("%f",&t2);

printf("dt->");

scanf("%f",&dt);

printf("\n---------------------\n");

printf("\n C F\n");

printf("\n---------------------\n");

c = t1;

do

{

f = (float)9/5 * c + 32;

printf("%5.2f %5.2f\n", c,f);

c = c + dt;

}

while ( c

I 114

printf("\n---------------------\n");

printf("\n ");

getch();

}

147. , - ,

. -

(, , -). - . . . >45 >23 >15 >0 : 3 : 83 : 27.67

147 //

//

#include

#include

void main()

{

int a; // ,

int n; //

int s; //

float m; //

s = 0;

n = 0;

printf("\ ");

printf(" .\n");

115

printf(" . .\n");

do {

printf("-> ");

scanf("%i", &a);

if (a > 0)

{

s += a;

n++;

}

} while (a > 0);

printf(" : %i\n", n);

printf(" : %i\n", s);

m = (float) s / n;

printf(" : %3.2f", m);

printf("\n\n ");

getch();

}

148. , -

( ). (, - , ). - . . . >56 >75 >43 >0 : 75

148 //

//

#include

#include

void main()

I 116

{

int a; //

int m; //

puts("\n ");

puts(" .");

puts(" . .");

m = 0;

do {

printf("-> ");

scanf("%i", &a);

if (a > m) m = a;

} while (a > 0);

printf(" : %i", m);

printf("\n ");

getch();

}

149. , - -

( ). - (, , ). - . . . >12 >75 >10 >9 >23 >0 : 9

149 //

//

#include

117

#include void main()

{ int a; //

int min; // printf("\n \n");

printf(" .\n");

printf(" . .\n");

printf("-> ");

scanf("%i", &a);

min = a; //

while ( a > 0)

{

if (a < min) min = a;

printf("-> ");

scanf("%i", &a);

}

printf(" : %i\n", min); printf("\n ");

getch();

}

150. , , - ( , ). - . , -

, .

-> 17 17 - .

150 // ,

#include

#include

I 118

void main()

{

int n; //

int d; //

int r; // n d

printf(" -> ");

scanf("%i", &n);

d = 2; //

do {

r = n % d;

if (r != 0) d++;

}

while ( r != 0 ); // n d

if (d == n)

printf("%i - " ,n);

else printf("%i - " ,n);

printf("\n\n ");

getch();

}

151. .

,

. -

.

151 //

#include

#include

#include

void main()

{

119

float x1,x2; //

float e; //

float dx; //

int n; //

float x; //

float y; //

float st; //

float sp; //

int i;

printf("\ \n");

printf(" -> ");

scanf("%f", &x1);

printf(" -> ");

scanf("%f", &x2);

printf(" -> ");

scanf("%f", &e);

dx = 0.5;

st = 0;

do

{

sp = st;

dx = dx / 2;

n = (x2 - x1) / dx;

x = x1;

st = 0;

for (i = 0; i

I 120

st = st + (y * dx);

x += dx;

}

printf(" : %6.3f\n", st);

}

while ( abs(sp - st) > e);

printf("\n ");

getch();

}

152. , "" - 1 10 .

(, , ). " ". "" 1 10. . -> 5 . -> 3 ! !

152 // " "

#include

#include // srand

#include

void main()

{

int comp; //

int igrok; //

int n; //

time_t t; // -

//

srand((unsigned) time(&t));

121

comp = rand() % 10 +1 ; // 1 10

clrscr();

cprintf("\n\r \"\" 1 10.\n\r");

cprintf(" ");

n = 0;

do {

cprintf("\n\r->");

cscanf("%i",&igrok);

n++;

} while ((igrok != comp)&&(n < 3));

if (igrok == comp)

{

textcolor(RED+BLINK);

cprintf("\n\r !");

}

else

{

textcolor(GREEN);

cprintf("\n\r .);

cprintf(" %d",comp);

}

textcolor(LIGHTGRAY);

cprintf("\n\r ...");

getch();getch();

}

153. . -

. -

, .

I 122

while , ,

:

While , . . ,

.

, do while, :

while , - ( ).

while , , , -

.

while - , ,

.

154. , - y = 2x2 5x 8 4 4. - 0,5.

123

154 //

#include

#include

void main()

{

float x,dx; //

float x1,x2; //

float y; //

x1 = -4;

x2 = 4;

dx = 0.5;

x = x1;

printf("--------------\n");

printf(" x | y\n");

printf("--------------\n");

while (x < x2)

{

y = x*x + 2;

printf("%3.2f | %3.2f\n", x, y);

x += dx;

}

printf("--------------\n");

printf("\n ");

getch();

}

155. , "" . ,

1 1/3 + 1/5 1/7 + 1/9 ..., - , /4.

I 124

(, -, ). -> 0.001 0.001000 3.143589 502 .

155 // ""

#include

#include

void main()

{

float p; //

float t; //

int n; //

float el; //

p = 0;

n = 1;

el = 1; //

printf("\n -> ");

scanf("%f", &t);

printf(" %f\n",t);

while (el >= t )

{

el = (float) 1 / (2*n -1);

if ((n % 2) == 0)

p -= el;

else p += el;

n++;

}

p = p*4;

printf("\n %f %f\n", t, p);

printf(" %i .\n", n); printf("\n ");

getch();

}

125

156. , .

156 //

// ( )

#include

#include

void main()

{

int n1,n2; // ,

int nod; //

int r; // n1 n2

printf("\n ");

printf(" .\n");

printf(" ");

printf(" ");

printf("-> ");

scanf("%i%i", &n1, &n2);

printf(" %i %i - ", n1, n2);

while (n1 % n2)

{

r = n1 % n2; //

n1 = n2;

n2 = r;

}

nod = n2;

printf("%i\n", nod);

printf("\n ");

getch();

}

I 126

, ,

:

, -, , .

.

.

() . - , .

0 n 1, n .

.

- , #define.

, (for, while).

- , . . -

.

157. , - ,

. -

.

127

-

.

a[0] -> 10 a[1] -> 16 a[2] -> 14 a[3] -> 5 a[4] -> 10 a[5] -> 22 a[6] -> 22 : 10 16 14 5 10 22 22 : 14.00

157 // ,

#include

#include

void main()

{

int a[7]; //

int sum; //

float m; //

int j;

printf("\n ");

printf(" \n");

//

for ( j = 0; j < 7; j++)

{

printf("na[%i] -> ", j);

scanf("%i",&a[j]);

}

//

printf("\n: \n");

I 128

for ( j = 0; j < 7; j++)

{

printf("%i ", a[j]);

}

sum = 0;

//

for ( j = 0; j < 7; j++)

{

sum = sum + a[j];

}

m = sum / 7;

printf(" : %f", m);

printf("\n ");

getch();

}

158. , , -

, .

-

.

a[1] -> 12 a[2] -> 0 a[3] -> 3 a[4] -> -1 a[5] -> 0 ------------------------- : 3

158 //

// ( )

#include

129

#include

#define SIZE 5 //

void main()

{

int a[SIZE]; //

int n = 0; // - -

int i; //

printf("\n .\n");

printf(" ");

printf(" \n");

for (i = 0; i < SIZE; i++)

{

printf("a[%i] ->",i+1);

scanf("%i", &a[i]);

if (a[i] != 0) n++;

}

printf(" %i .\n", n);

printf("\n ");

getch();

}

159. , - . -

(, , ). 5 -> 23 0 45 -5 12 : -5

159 //

#include

#include

I 130

#define HB 5 //

void main()

{

int a[HB]; //

int min; //

int i; //

printf("\n \n");

printf(" ");

printf("%i \n", HB);

printf("-> ");

for (i = 0; i < HB; i++)

scanf("%i",&a[i]);

min = 0; // , -

// -