Find given number is a perfact or not

 #include<stdio.h>
void main()
{
int n,i,sum=0;
clrscr();
printf("Enter a number: ");
scanf("%d",&n);

  for(i=1;i<n;i++)
  {
      if(n%i==0)
      sum=sum+i;

  }
  if(sum==n)
      printf("%d is a perfect number",i);
  else
      printf("%d is not a perfect number",i);

getch();
}