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);
    }
}