C++ Program to Find Perfect Number

Here we will learn how to program using C++ in order to find the perfect number.
A Perfect Number is a number that has equal factors.

C++ Code:


#include<iostream>
#include<iomanip>
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";
  else
         cout << i << " is not a perfect number";
  system("pause");
  return 0;
}

#include<iostream>

#include<iomanip>

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";

else

cout << i << " is not a perfect number";

system("pause");

return 0;

}

C++ Program to Find Perfect Number1 min read

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