所有四平方定理c++

以下是C++代码实现四平方定理：

#include <iostream>
#include <cmath>

using namespace std;

int main() {
    int c;
    cout << "Enter the value of c: ";
    cin >> c;

    for (int a = 0; a * a <= c; a++) {
        for (int b = a; b * b <= c - a * a; b++) {
            for (int d = 0; d * d <= c - a * a - b * b; d++) {
                int e = c - a * a - b * b - d * d;
                if (e >= 0 && sqrt(e) == (int)sqrt(e)) {
                    cout << "a = " << a << ", b = " << b << ", c = " << c << ", d = " << d << ", e = " << sqrt(e) << endl;
                    return 0;
                }
            }
        }
    }

    cout << "No solution found!" << endl;
    return 0;
}

该程序通过三层嵌套循环枚举a、b、d的值，并计算出e的值，判断e是否为完全平方数，如果是，则输出所有变量的值。如果没有找到解，则输出“No solution found!”