March 10, 2015 Bi tp tun 1 Pht trin ng dng CSDL 2]

1. Vit chng trnh tnh din tch hnh trn. Hy xut ra cng thc cng kt qu ca cng thc .

V d: S=R^2x 3.14 = 3^2* 3.14 = 28.26

2. Hy vit chng trnh tm nghim phng trnh bc 2 c dng: ax2 +bx + c=0

Cch gii: C th tham kho trn internet

3. Hy nhp s nguyn dng n, xut s nh phn ca n, tng cc s nh phn.

V d: n= 10, cc s nh phn: 1010, tng : 2

4. Vit chng trnh nhp chui cc k t, hy m tn sut xut hin ca tt c cc k t theo nh

dng nh sau:

Chui: Hello

Xut: H: 1 ; e: 1; l: 2; o: 1

5. Vit chng trnh tnh khong cch 2 im A v B trong khng gian 2 chiu

6. Vit chng trnh cng 2 phn s, phn s a v phn s b

7. Vit chng trnh chia 2 phn s, phn s a v phn s b

8. Vit chng trnh tm ch s ln nht ca mt s nguyn dng n. V d: n=123 , max=3

9. Vit chng trnh nhp vo nm sinh ca mt hc sinh, hy cho bit s may mn ca hc sinh

ny. S may mn tnh bng tng cc s nm sinh, nu kt qu nh hn 10 th tip tc tnh

tng kt qu ln na, V d: namsinh=1999 = 1+9+9+9=28=2+8=10=1+0=1 => S may mn

l s 1

10. Vit chng tnh tnh tng theo cng thc: S(n)=1/2 + 1/4 + 1/6 + 1/8 + . +1/(2*n.)

Hng dn Cng c lp trnh: Eclipse

Bc 1

Bt u eclipse: Chn workspace => Qun l tt c project c to ra trong workspace ny

March 10, 2015 Bi tp tun 1 Pht trin ng dng CSDL 2]

Bc 2

To Java Project : Project cha th mc src, cc m ngun java c lu ti y, ban u eclipse to

project rng.

Cc bc: File -> New -> Project -> Java Project

Nhn Next -> Chn tn project -> Finish

March 10, 2015 Bi tp tun 1 Pht trin ng dng CSDL 2]

Bc 3: To class bao gm hm main, hm main thc thi chng trnh

Click phi th mc src -> New -> Class

t tn class, tn gi, v check ty chn pht sinh hm main -> Finish

March 10, 2015 Bi tp tun 1 Pht trin ng dng CSDL 2]

- Ni dung hm main

package com.pmtu;

public class Bai01 {

public static void main(String[] args) {

// TODO Auto-generated method stub

}

}

- Cc hm nhp xut c bn

Hm xut:

System.out.print("chuoi hien thi");

Xut c nh dng:

int a=12;

System.out.printf("%d",a);

Xut v xung dng

System.out.println("chuoi hien thi ");

Hm nhp:

Dng class Scanner qun l nhp d liu t thit b bn phm

Scanner sc=new Scanner(System.in);

Nhp chui, s nguyn, s thc, token,..

V d:

March 10, 2015 Bi tp tun 1 Pht trin ng dng CSDL 2]

package com.pmtu; import java.util.Scanner; public class Bai01 { public static void main(String[] args) { // TODO Auto-generated method stub Scanner sc=new Scanner(System.in); System.out.print("Nhap a: "); int a=sc.nextInt(); System.out.print("Nhap b: "); int b=sc.nextInt(); int sum=a+b; System.out.printf("Tong la: %d ",sum); } }

Thc thi chng trnh

Nhn Ctrl+F11

Hoc biu tng trn toolbar

Kt qu chng trnh hin th ca s Console

March 10, 2015 Bi tp tun 1 Pht trin ng dng CSDL 2]

Hoc nu khng thy c th chn Window -> Show View -> Console