C++ Program to Find Perfect Number

In this program, we are going to share how to find a perfect number using C++ programming language. If you are a beginner and want to start learning the c++ programming, then keep your close attention in this tutorial as I am going to share a c++ program to find perfect number.

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Copy the below C++ program and execute it with the help of C++ compiler. At the end of this program, We have shared the output of this program.

#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;

}

#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;

}

Program Output

6 is a perfect number
15 is not a perfect number
28 is a perfect number
496 is a perfect number

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C++ Program to Find Perfect Number

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Program Output

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