四位整数每位相加之和

#include <iostream>
using namespace std;
int main()
{
    int x, a, b, c, d;
    int s = 0;
    cout << "请输入一个四位数整数：" ;
    cin >> x;
    a = x % 10;
    b = x / 10 % 10;
    c = x / 100 % 10;
    d = x / 1000 % 10;
    s = a + b + c + d;
    cout <<"每位数相加之和为："<< s << endl;
    system ("pause");
    return 0;
}