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Thread: Java code problem?

  1. #1
    Member Scorks's Avatar
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    Jan 2013
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    Default Java code problem?

    Hi all! My assignment question is this:

    Write a program that asks the user to input
    The number of gallons of gas in the tank
    The fuel efficiency in miles per gallon
    The price of gas per gallon
    Then print the cost per 100 miles and how far the car can go with the gas in the tank.

    Thus far, I've written the code:

    public class assignmenti
    public static void main ( String args[] )
    Scanner keyboard = new Scanner(System.in);
    double gallons, milesPerGallon, pricePerGallon;

    //Get input
    System.out.println("Gallons in the tank?");
    gallons = keyboard.nextdouble();
    System.out.println("Fuel efficiency?");
    milesPerGallon = keyboard.nextdouble();
    System.out.println("Price of gas per gallon?");
    pricePerGallon = keyboard.nextdouble();

    // Print output
    System.out.println("Cost per 100 miles:" + ((100/milesPerGallon) * pricePerGallon) + "Dollars");
    System.out.println("How far the car can go:" + (gallons * milesPerGallon) + "miles");

    But it won't compile inside my terminal. Anyone see any detrimental errors here as to why my program isn't working?

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
    Thanked 2,635 Times in 2,585 Posts

    Default Re: Java code problem?

    it won't compile
    Please copy the full text of the error messages and paste it here.

    Please edit your post and wrap your code with
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
    Junior Member
    Join Date
    Feb 2012
    Thanked 2 Times in 2 Posts

    Default Re: Java code problem?

    just making sure you imoported the needed class for your scanner.
    import java.util.*;
    this must be at the very top of your code.
    also keyboard.nextdouble();
    you must use capitals on the doubles
    i fixed those 4 things and it now compiles
    hope this helps

  4. The Following User Says Thank You to dave_alan For This Useful Post:

    Scorks (January 30th, 2013)

  5. #4
    Member Scorks's Avatar
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    Jan 2013
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    Default Re: Java code problem?

    Oh, didn't realize I wasn't capitalizing the doubles. I fixed that and it compiled for me too. Thanks a load!


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