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Thread: having bad time with basic calculator code

  1. #1
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    Default having bad time with basic calculator code

    i dont know how to get my test class to work and return a value entered.
    my superclass must be abstract while my subclasses have to be concrete(non-abstract)
    it seems that i cannot access the addition method from the testclass for some reason

    package courseworkz;
    public abstract class Coursework{


    public void test()
    {
    if (answer<5000){
    return;
    }
    }

    public void view()
    {

    }

    public class addition extends Coursework{


    void add(double fnum, double snum)
    {

    double newanswer = fnum + snum;
    newanswer = answer;


    }


    }

    public class subtraction extends Coursework{

    public void sub(double fnum, double snum)
    {
    double newanswer = fnum - snum;
    newanswer = answer;

    }
    }

    public class multiplication extends Coursework{

    public void multiply(double fnum, double snum)
    {
    double newanswer = fnum * snum;
    newanswer = answer;

    }
    }

    public class division extends Coursework{

    public void divide(double fnum, double snum)
    {
    double newanswer = fnum / snum;
    newanswer = answer;

    }


    }

    double fnum; double initial; double snum; double answer;

    }

    this is my test class


    package courseworkz;

    public class courseworktest
    {
    public static void main(String[]args){

    addition test = new addition();
    test.add(5);

    }
    }


    thanx for the help


  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: having bad time with basic calculator code

    When posting code, make sure you use the highlight tags. And it would help if you followed standard naming conventions- classes start with an upper-case letter, methods and variables with lower-case letters.

    What is the exact error message you're getting?
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
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