Find The Perfect Number In C++ Program

C++ program to find if a number is a perfect number or not. A Perfect number is one which the sum of all its divisors equals to the number.
For example 28 a Perfect Number since the sum of its divisors which are 1+ 2 + 4 + 7 + 14 = 28

Also Read: C++ Program To Find Roots Of a Quadratic Equation
                 C++ Program To Find Prime Numbers

#include<iostream.h>
#include<math.h>
int main()
{
int i,n,sum=0;
cout<<"enter a number";
cin>>n;
for (i=1;i<n;i++)
  {
 if(n%i==0)
 sum=sum+i;
  }
 if(sum==n)
  cout<<i<<"is a perfect number";
 else
  cout<<i<<"is not a perfect number";
return 0;
}