#include using namespace std;

int main() {

int a = 0;
int b = 0;
while (cin >> a >> b)
{
    if (a ==0&&b==0)
    {
        break;
    }
        cout << a + b << endl;
       
        
    
   

   }
return 0;

}

java简单实现

import java.util.*;

public class Main {
    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {
        for (int a = scanner.nextInt(), b = scanner.nextInt();
             a != 0 || b != 0;
             a = scanner.nextInt(), b = scanner.nextInt())
            System.out.println(a + b);
    }
}