java编程练习【四平方和定理】

import java.util.Scanner;

public class Si_ping_fang_sum {
    public static void main(String[] args) {
        int number;
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入一个整数[0,5000000]");
        number = sc.nextInt();
        while (number >= 5000000 || number <= 0) {
            System.out.println("请重新输入一个整数[0,5000000]");
            number = sc.nextInt();
        }
        for (int i = 0; i <= number; i++) {
            for (int j = 0; j <= number; j++) {
                for (int m = 0; m <= number; m++) {
                    for (int n = 0; n <= number; n++) {
                        if (i <= j && j <= m && m <= n && i * i + j * j + m * m + n * n == number) {
                            System.out.println(i + " " + j + " " + m + " " + n);
                        }
                    }
                }
            }
        }
    }
}