#include <stdio.h>
#pragma warning(disable: 4996)
//#define _CRT_SECURE_NO_WARNINGS same use as above.  for integer input to disable warnings/issues.

int main(void) // void and you don't need to return an integer
{
	//declare my variables up front
	int userInt, counter1, counter2 = 0, counter3 = 1, product1 = 0, product2 = 0, product3 = 0; // initialize everything but the user input and for loop (redundant)

																								 // get input
	printf("Enter an integer: ");
	scanf("%d", &userInt);

	// for loop
	for (counter1 = 0; counter1 <= userInt; ++counter1)
	{
		product1 += counter1;
	}

	// while loop
	while (counter2 <= userInt)
	{
		product2 += counter2++;
	}

	// do while loop
	do {
		product3 += counter3;
		counter3 += 1;
	} while (counter3 < userInt + 1);

	// print it all on separate lines for clarity
	printf("\n-------------------------for loop----------------------------\nThe sum of the integers from 1 to %d is %d\n", userInt, product1);
	printf("\n------------------------while loop---------------------------\nThe sum of the integers from 1 to %d is %d\n", userInt, product2);
	printf("\n-----------------------do while loop-------------------------\nThe sum of the integers from 1 to %d is %d\n", userInt, product3);

}