/* Program 3: This program will estimate expenses for a round-trip car trip, focusing on gas costs. */
/* Author: Nicholas Della Vecchia */
/* Date: 2/01/01 */

#include <stdio.h>
int main() 
{
	/* variable decleration section */
	/* define variable for the number of miles between cities */
	double numbermiles;
	/* define variable for expected number of miles per hour */
	double milesperhour;
	/* define variable for expected miles per gallon */
	double milespergallon;
	/* define variable for expected cost per gallon */
	double costpergallon;
	/* define variable for gallons */
	double gallons;
	/* define variable for price */
	double price;
	/* define variable for the cost of the trip */
	double cost;
	/* define variable for the total round trip miles */
	double roundtrip;
	/* define variable for the actual miles per gallon on the trip */
	double tripmpg;

	printf ("Welcome to the Fuel Cost Estimator Program\n\n\n");
	
	/* variable assignments */
	/* input from the user the value of numbermiles */
	printf ("Please enter the number of miles between cities: ");
	scanf ("%lf",&numbermiles);
	/* input from the user the value of milesperhour */
	printf ("\nPlease enter the expected miles per hour: ");
	scanf ("%lf",&milesperhour);
	/* input from the user the value of milespergallon */
	printf ("\nPlease enter expected miles per gallon: ");
	scanf ("%lf",&milespergallon);
	/* input from the user the value of costpergallon */
	printf ("\nPlease enter the expected cost per gallon: ");
	scanf ("%lf",&costpergallon);
	printf ("\n\n\n");

	/* Calculations */
	/* Calculate the total miles for a round trip */ 
	roundtrip = (numbermiles * 2);
	/* Calculation if speed is over 50 miles/hour, then the miles per gallon increases by 10% */
	if (milesperhour > 50)
		tripmpg = ((milespergallon * .10) + milespergallon);
	else
		tripmpg = milespergallon;
	/* Calculate the actual gallons used on the trip */
	gallons = (roundtrip/tripmpg);
	/* Calculate the cost of the whole trip */
	cost = (costpergallon * gallons);
	

	/* Results */
	printf ("===============================================================================\n\n\n");
	printf ("Estimate for Customer:\n\n");
	printf ("Miles:   One way:     %0.2f \n", numbermiles);
	printf ("         Round Trip:  %0.2f \n\n", roundtrip);
	printf ("Mpg:     City:        %0.2f \n", milespergallon);
	printf ("         Trip:        %0.2f \n\n", tripmpg);
	/* Show user the final gallons used on trip and price of trip */
	printf ("Gallons:              %0.2f \n", gallons);
	printf ("Price:                %0.3f \n", costpergallon);
	printf ("Cost:                 %0.2f \n\n\n", cost);
	printf ("===============================================================================\n\n\n");
}