Write a function that check if a number is a Perfect number.

In number theory, 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.

For example  28 = 1 + 2 + 4 + 7 + 14 is a perfect number.

#include<stdio.h>
#include<conio.h>

int isPerfect(int nb)
{
	int i, sum, n;
	sum = 0;
	n = nb;

	for (i = 1; i<n; i++)
		if (n%i == 0)
			sum += i;

	return (nb == sum);
}


void main()
{
	int a;
	printf("Enter an integer: ");
	scanf("%d", &a);

 
	if (isPerfect(a))
		printf("%d is Perfect.\n",a);
	else
		printf("%d is not Perfect.\n", a);
 
	getch();
}