Here is the c Program to Calculate Gas Mileage.

Question:

(3.16. C How to Program)

(Gas Mileage) Drivers are concerned with the mileage obtained by their automobiles. One driver has kept track of several tankfuls of gasoline by recording miles driven and gallons used for each tankful. Develop a program that will input the miles driven and gallons used for each tankful.

The program should calculate and display the miles per gallon obtained for each tankful. After processing

all input information, the program should calculate and print the combined miles per gallon obtained for all tankfuls.

Source Code:

#include <stdio.h>

#include <stdlib.h>

int main()

{

    float total=0,mpg,avg,gallons,miles;

    int count=0;

    while (gallons>0){

    printf("Enter the gallons used (-1 to end):");

    scanf("%f",&gallons);

    if (gallons==-1)

    break;

    printf("Enter the miles driven:");

    scanf("%f",&miles);

    mpg=miles/gallons;

    printf("The miles/gallon for this tank was:%f\n",mpg);

    count++;

    total+=mpg;

    }

    avg=total/count;

    printf("Average is %f",avg);

    return 0;

}

Note: