//This program will determine the MPG of a vehicle given the miles driven and the gallons of gas list

#include <stdlib.h>
#include <stdio.h>
#include <math.h>

void main(void)
{
	// Defining the variables for the program
	float gallons, mpg;
	int miles,iteration;
	float mpgt, mpga;

	//initializing the float values

	gallons = 0;
	mpg = 0;
	mpgt = 0;
	mpga = 0;
	iteration = 0;

	//while loop that will run program through multiple iterations
	while (gallons != -1)
	{
		//Obtaining the number of gallons used
		printf("Please enter gallons used(enter -1 to end):\n");
		scanf_s("%f", &gallons);
		//Obtaining the
		printf("Please enter miles driven:\n");
		scanf_s("%d", &miles);

		//Calculating Miles per Gallon

		mpg = (float)miles / gallons;

		printf("The Miles per Gallon for this tank was %.5f\n", mpg);
		//Stores the total mpg over x iterations
		mpgt = mpgt + mpg;//This was the line in question. this was my solution
		//keeps track of the number of iterations performed
		iteration = ++iteration;
	}
	mpga = mpgt / iteration;

	printf("mpgt = %f", mpgt);

	printf("The average MPG of all tanks is %.6f\n", mpga);

	printf("\n\n");
	system("pause");
}