题目描述

各位哥哥，姐姐们，我来自上海，我已经学编程1年多了，这是我的代码，大家请不要见笑！

C++ 代码

#include<bits/stdc++.h>
using namespace std;
int main () {
    int n, a, b, c, d, m, l;
    cin >> n;
    while (true) {
        a = n % 10;
        b = n / 10 % 10;
        c = n / 100 % 10;
        d = n / 1000;
        if(a > b)swap(a, b);
        if(a > c)swap(a, c);
        if(a > d)swap(a, d);
        if(b > c)swap(b, c);
        if(b > d)swap(b, d);
        if(c > d)swap(c, d);
        m = d * 1000 + c * 100 + b * 10 + a * 1;
        l = a * 1000 + b * 100 + c * 10 + d * 1;
        n = m - l;
        a = m % 10;
        b = m / 10 % 10;
        c = m / 100 % 10;
        d = m / 1000;
        cout << d << c << b << a << " - ";
        a = l % 10;
        b = l / 10 % 10;
        c = l / 100 % 10;
        d = l / 1000;
        cout << d << c << b << a << " = ";
        a = n % 10;
        b = n / 10 % 10;
        c = n / 100 % 10;
        d = n / 1000;
        cout << d << c << b << a << endl;
        if(n == 6174 || m == l) return 0;
    }
    return 0;
}