gistfile1.java

import java.util.Scanner;

class NewCar
    {
    //instance variables
    double start, end, galls;
    //constructor
    NewCar(double start)
        {
        this.start=start;        
        }
    //methods
    void fillUp(double miles, double galls)
        {
        this.galls=galls;
        //bla
        //bla
        }
    double mpg()
        {
        return (end-start)/galls;
        }
    }
    
class thirtyone2
    {
    public static void main (String[] args)
        {
        //get data, construct car
        Scanner keyboard=new Scanner(System.in);
        System.out.println("New car odometer reading:");
        double start=keyboard.nextDouble();
        NewCar car=new NewCar(start);
          
        //2 gas station visits
        for(int i=1; i<=2; i++)
            {
            System.out.println();
            System.out.println("Filling Station Visit");
            System.out.println("odometer reading:");
            double miles=keyboard.nextDouble();
            System.out.println("Gallons to fill tank:");
            double galls=keyboard.nextDouble();
            car.fillUp(miles,galls)
            System.out.println("Miles per gallons: "+car.mpg());
            }
        }
    }