[编程入门]完数的判断-题解(Java代码)

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
for (int i = 2; i <= a; i++) {
int num = 0;
int b[]=new int[100];
int k=0;
// 找到每一个数字的因子
for (int j = 1; j < i; j++) {
if (i % j == 0) {
num += j;
b[k++]=j;
}
}
if (i==num){
System.out.print(i+” “+”its factors are”+” “);
for(int u=0;u<k;u++)
if(u==k-1)
System.out.println(b[u]);
else
System.out.print(b[u]+” “);
}
}
}
}