Question

从键盘输入一个整数,判断该数是否是完全数

Answer 1

#include<stdio.h>
int f(int k)
{
int i,sum=0;
for(i=1;i<k;i++)
{
if(k%i==0)
sum=sum+i;
}
if(sum==k)
return 1;
else
return 0;
}
int main()
{
int n;
scanf("%d",&n);
if(f(n))
printf("The number %d is a wanshu\n",n);
else
printf("The number %d is not a wanshu\n",n);
return 0;
}