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# Answer to Question #49713 in C++ for nada

Question #49713
Write a program that:
Prompts the user to enter a positive integer N.
Calls the user-defined function isPerfect( ) which checks if N is perfect or not. A number is perfect if the sum of its divisors other than the number itself. For example 28 is perfect since 28 = 1 + 2 + 4 + 7 + 14, while 8 is not perfect since 8 ≠ 1+ 2 + 4
Prints a message.
Expert's answer
#include <iostream>
using namespace std;
int sum_of_divisors(int n) {
int sum = 0;
for (int i = 1; i < n; ++i) {
if (n % i == 0) sum += i;
}
return sum;
}
int main() {
int user_number=0;
cout<<"PLease input number ";
cin>>user_number;
cout<<sum_of_divisors(user_number)<<endl;
if ( user_number - sum_of_divisors(user_number)==0) {cout<<"Number is perfect";}
else {cout<<"Number is not perfect";};
return 0;
}
``﻿``

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