Write a program Whether the given Check Perfect Number

//write a program  Whether the given  Check Perfect Number .

#include<iostream>
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";


return 0;

}