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Thread: Simple coding question, 1 error

  1. #1
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    Default Simple coding question, 1 error

    Im reading this book called "Head First Java" by Kathy Sierra and on page 20 it says this. This is the link to the page i am on and the problem i need to work.

    http://books.google.com/books?id=uIV...uffle1&f=false


    this is the code i wrote.

    public class Practice {
    public static void main(String[] args){
    int x = 3;
    while (x > 0) {
    if (x > 2) {
    System.out.print("a");
    }
    if (x == 2) {
    System.out.print("b c");
    }
    if (x == 1) {
    System.out.print("d");
    x = x - 1;
    }
    x = x - 1;
    System.out.print("-");
    }
    }
    }

    I am supposed to get the answer: a-b c-d
    instead i get the answer: a-b c-d-

    How is this?
    Last edited by Extrocity; April 12th, 2014 at 08:49 PM.


  2. #2
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    Default Re: Simple coding question, 1 error

    It's
    System.out.print("-");

    Put some breakpoints out and follow whats happens and im sure youll get a clearer picture of what's happening.

    --- Update ---

    public class Practice {
     
    	public static void main(String[] args) {
    		int x = 3;
    		while (x > 0) {
     
    			if (x > 2) {
    				System.out.print("a");
    				System.out.print("-");
    			}
     
    			if (x == 2) {
    				System.out.print("b c");
    				System.out.print("-");
    			}
     
    			if (x == 1) {
    				System.out.print("d");
    				x = x - 1;
    			}
     
    			x = x - 1;
    			//System.out.print("-");
    		}
    	}
    }

    What you're doing is printing out a "-" every time in the while loop. You loop 3 times therefore you'll get the "-" 3 times as well. But like a said follow the debuggers it's a good way to learn.
    Last edited by sebbe605; April 12th, 2014 at 02:09 PM.

  3. #3
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    Default Re: Simple coding question, 1 error

    Is there another way to do it by re-organizing things? i was given blocks of code and told to organize them to get the answer.

    x = x - 1;
    System.out.print("-");

    was one whole block of code that i had to place somewhere.

  4. #4
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    Default Re: Simple coding question, 1 error

    Please post your code correctly.

    What are the assembled blocks of code supposed to do? We're a bit blind here.

  5. #5
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    Default Re: Simple coding question, 1 error

    Im not sure what your trying to do. please elaborate.

    Also use code block when posting code, see FAQ!

  6. #6
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    Default Re: Simple coding question, 1 error

    How did you get the block from the beginning?

  7. #7
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    Default Re: Simple coding question, 1 error

    I updated the thread. Now it has the page of the book i am on that explains the dirrections. I also put my code in a code block. Hopefully someone can help me clear this up!

    --- Update ---

    I updated my thread, i got the code blocks from the page in the java book i am reading. I put a link to the page in my thread.

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