完数-JZTXT

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
main()
{
	int i, j, s, n;
	printf("输入所范围的上限:");
	scanf("%d", &n);
	for (j = 2; j <= n; j++)
	{
		s = 1;		//保证每次循环i的初值为1
		for (i = 2; i <= j / 2; i++)
			if (j % i == 0)	//判断i是否为j的因子
				s += i;
		if (s == j)printf("This is a perfect number:%d\n", j);
	}
}