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#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <math.h>

int main()
{
	int num;
	int sum = 0;
	int i; //Loop variable
	char keepGoing;

	// prompts user to enter a number
	printf("Enter a number between 100 and 10,000\n");
	scanf("%d", &num);

	//if number isnt within range
	while (num < 100 || num>10000) {
		printf("This number is outside the accepted range.\n");
		printf("Enter a number between 100 and 10,000\n");
		scanf("%d", &num);
	}

	keepGoing = 'y';
	sum = 0;
	//if number is within range
	if (num >= 100 && num <= 10000) {

		while (keepGoing == 'y') {



			for (i = 1; i < num; i++) {


				if (num%i == 0) {
					sum = i + sum;
				}



				if (num == sum) {
					printf("Number %d is perfect.\n", num);
					printf("Number of iterations are %d.\n", i);
				}
				else {
					printf("Number %d is not a perfect number.\n", num);
					printf("Number of iterations are %d.\n", i);
				}


			}
			printf("Do you want to continue? (y/n) ");
			scanf("%s", &keepGoing);

			if (keepGoing == 'n') {
				printf("Goodbye.\n");
			}
			else {
				printf("Enter a perfect number \n");
				scanf("%d", &num);
			}

		}
	}

	return 0;
}