C program to check whether the entered number is perfect number or not

#include<stdio.h>
#include<conio.h>
void main()
{
int n,i,s=0;
scanf("%d",&n);
for(i=1;i<n;i++)
{
if(n%i==0)
s=s+i;
}
if(s==n)
printf("This is a perfect number");
else
puts("This is not a perfect number");
}