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Thread: Area calculator.

  1. #1
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    Default Area calculator.

    What am I missing? There is no errors in the actual script, but when I run it it just says successful and isn't asking for variables. What am I missing?

    /*
     * To change this template, choose Tools | Templates
     * and open the template in the editor.
     */
     
    /**
     *
     * @author Logan
     */
    import java.util.Scanner;
    public class area {
     
     
        public static void main(String[] args) 
        {
            //Declaring Variables.
            int triHeight, triBase, lengthRect, widthRect, shapeNum;
            double circRadi;
     
            Scanner reader = new Scanner (System.in);
     
            //Receiving Input
            System.out.println ("Which shape do you want area for?");
            System.out.println("1 Triangle 2 Circle 3 Rectangle 0 None");
            shapeNum = reader.nextInt ();
            if (shapeNum == 1) {
                System.out.println("Base of triangle?");
                triBase = reader.nextInt ();
                System.out.println("Height of triangle");
                triHeight = reader.nextInt ();           
             }
            if (shapeNum == 2) {
                System.out.println("Radius of circle?");
                circRadi = reader.nextDouble ();
            }
            if (shapeNum == 3) {
                System.out.println ("Length of rectangle?");
                lengthRect = reader.nextInt ();
                System.out.println("Width of rectangle?");
                widthRect = reader.nextInt ();
     
            }
     
     
     
     
        }
        public static void areaTriangle(int triBase,int triHeight, int triOutput) {
            triOutput = (triBase*triHeight)/2;
        }
     
        public static void areaCircle (double circOutput,int circRadi ) {
            circOutput = (circRadi*Math.PI);
        }
     
        public static void areaRectangle(int rectOutput, int lengthRect, int widthRect) {
            rectOutput = lengthRect*widthRect;
        }
    }


  2. #2
    Super Moderator helloworld922's Avatar
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    Default Re: Area calculator.

    I don't see any reason why the program itself won't ask for user inputs. There's no code for displaying the computed areas, though (only for calculating them).

    Things to try:

    1. Try saving and re-compiling your code. Perhaps you're running an older version.

    2. Make sure you're running the correct program. This should be easier to do with command-line, a little more difficult in some IDE's (if you're using one, let us know which one you're using).

    3. Are you actually running the program, or just compiling it? Reason I ask is because usually the compiler will tell you it successfully compiled the code, while running a program which does nothing will just have an empty output. If you're using the command-line, please copy/paste your commands and any outputs given.

  3. #3
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    Default Re: Area calculator.

    I'm using textpad, and just copy/pasting the code it runs perfectly. It asks for variables, it didn't display anything, as helloworld pointed out, but it does ask for the variables. What are you using to compile/run?

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    Default Re: Area calculator.

    I am using NetBeans.

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    Default Re: Area calculator.

    Also, I have hit run>mainproject> and set it to area which is the program im trying to run

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    Default Re: Area calculator.

    Quote Originally Posted by LoganC View Post
    Also, I have hit run>mainproject> and set it to area which is the program im trying to run
    Unfortunately, I don't know anything about NetBeans, but the code works perfectly, no errors. The only thing is it doesn't display the numbers it computes, but it does asks for the variables and computes them, had to be an error in terms of either your computer or a glitch in the program, as the code is fine.

  7. #7
    Super Moderator helloworld922's Avatar
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    Default Re: Area calculator.

    I've only very briefly tried Netbeans a long time ago, but I think you have to manually re-compile to code before running it.

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    Default Re: Area calculator.

    The only thing I have seen is build and run.... I have built it but it didn't change the results for me.

  9. #9
    Super Moderator helloworld922's Avatar
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    Default Re: Area calculator.

    hmm... that's really odd. Can you try compiling/running the program from the command-line?

  10. #10
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    Default Re: Area calculator.

    Fixed, under my packages, it was named area.java and not Area.java. Thanks guys. But also, may I help some help as to what I should do to output the math that the program is computing? Im confused on where to start.
    Last edited by LoganC; September 22nd, 2012 at 06:33 PM.

  11. #11
    Super Moderator jps's Avatar
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    Default Re: Area calculator.

    Quote Originally Posted by LoganC View Post
    Fixed, under my packages, it was named area.java and not Area.java. Thanks guys. But also, may I help some help as to what I should do to output the math that the program is computing? Im confused on where to start.
    If you have a new question, please start a new thread so that searching a forum is more useful. Post the related code and your instructions to make it easy to understand. Finally be sure to ask a question specifically about what problem you have. The first step in solving any problem is understanding the problem to be solved. Then you need to decide how to solve it without worrying about code. When ever you get stuck you will have a good question to ask by default.

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