How to do perfect number on c++?

Question

Please, help with it. I've already spend a lot of time for it, but all wrong((

Answer 1

//here you go !!
#include <iostream>
#include <cctype>
using namespace std;
int main()
{ int n,i=1,sum=0;
cout << "Enter a number: ";
cin >> n;
while(i<n){
if(n%i==0)
sum=sum+i;
i++; }

if(sum==n)
cout << i << " is a perfect number\n";
else
cout << i << " is not a perfect number\n";

system("pause");
return 0; }