Answer to Question #345234 in C++ for Ali

Question

Input a positive integer from the user and determine whether the number is a perfect number or not.

Note: A perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the

sum of its positive divisors excluding the number itself.

Answer 1

#include <iostream>

using namespace std;

int main()
{
	int num;
	cout << "Please, enter a number to check: ";
	cin >> num;
	int sum=0;
	for (int i = 1; i < num; i++)
	{
		int d = num%i;
		if (d == 0)
			sum += i;
	}
	if (sum == num)
		cout << num << " is a perfect number";
	else
		cout << num << " is not a perfect number";
}