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Thread: Some simple help please!

  1. #1
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    Default Some simple help please!

    Some background... this is my second week in java and so far its going great in my comp sci class, but some of the eIMACS labs are killing me.



    In the following code segment, a and b are non-negative doubles. Write code that assigns to b the result of rounding a to one decimal place.

    // Enter a value to test here
    double a = ;
    double b;

    // Enter your code here

    I have tried to use Math.round(a,1); to round to one decimal place, its not working and i have no idea how to do it any other way, any help will be great.


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Some simple help please!

    its not working
    Can you post the code you executed and its output that shows the problem.
    Last edited by Norm; September 6th, 2012 at 08:57 PM.
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    Default Re: Some simple help please!

    // Enter a value to test here
    double a =6.05000001 ;
    double b;

    // Enter your code here
    b = Math.round(a,1);

    After running this error occurs:

    TC1.java:16: cannot find symbol

    symbol : method round(double,int)

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: Some simple help please!

    cannot find symbol
    That says the compiler can not find a definition for a round method with the args of double and int.
    Where did you see that method defined? Do you have the correct import statement to tell the compiler where the method is defined?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Some simple help please!

    um, i did not add a import statement b/c i assumed the complier in eimacs already had that. I would need to use
    import java.lang.Math;
    right?

  6. #6
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    Default Re: Some simple help please!

    Where is the method defined that you are trying to use? Where did you see doc for how to code it?

    EDIT: Sorry, I don't know anything about eimacs.
    Last edited by Norm; September 6th, 2012 at 09:14 PM.
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    Default Re: Some simple help please!

    Um i.. don't know.

    This might help, its all i'm really given
    Capture.jpg

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    Default Re: Some simple help please!

    Do you know where the Java SE packages and classes and their methods are defined? You need to have a link to the site where the API doc is:
    Java Platform SE 7

    Instead of making up method names and their args, go to the API doc and find one that will work.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Some simple help please!

    Ok, ill try and find one that works.

    Thanks for the help.

  10. #10
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    Default Re: Some simple help please!

    What has been discussed in your class so far? What techniques have you been shown?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Some simple help please!

    Kind of old, and kind of a stupid way to do it but here you go.
    ...
    Last edited by copeg; June 7th, 2013 at 01:22 PM. Reason: Removed spoonfeeding

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    Default Re: Some simple help please!

    firecool67, welcome to the forums. Please read the following:
    Announcements - What's Wrong With My Code?
    The Problem with Spoon-feeding

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