题解 | #牛牛的四叶玫瑰数#

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
    int l, r;
    int t = 0;
    double sum = 0;
    cin >> l >> r;
    int arr[4] = { 0 };
    for (int i = l; i <= r; i++)
    {
        t = i;
        for (int j = 0; j < 4; j++)
        {
            arr[j] = t % 10;
            t = t / 10;
            if (t == 0)
            {
                break;
            }
        }
        sum = pow(arr[0], 4) + pow(arr[1], 4) + pow(arr[2], 4) + pow(arr[3], 4);
        if (sum == i)
        {
            cout << i << " ";
        }
        arr[4] = { 0 };
    }
    return 0;
}