#include using namespace std; int main() {

int a, b;
while(cin >> a >> b){
    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) {
        while (scanner.hasNext())
            System.out.println(scanner.nextInt() + scanner.nextInt());
    }
}