題目：

Your task is to Calculate a + b.

Input

Input contains multiple test cases. Each test case contains a pair of integers a and b, one pair of integers per line. A test case containing 0 0 terminates the input and this test case is not to be processed. 

Output

For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input. 

Sample Input

1 5
10 20
0 0

Sample Output

6
30

題意：

求a+b，但是多了一個結束條件，就是當a==0&&b==0時，結束；

程式碼如下：

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
	Scanner input=new Scanner(System.in);
	int a,b;
	while(true) {
		a=input.nextInt();
		b=input.nextInt();
		if((a==0)&&(b==0))
			break;
		System.out.println(a+b);
	}
}
}