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Thread: [HELP] TRIANGLE!

  1. #1
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    Unhappy [HELP] TRIANGLE!

    OUTPUT
    *
    **
    ***
    ****
    *****
     
    *****
    ****
    ***
    **
    *
     
            *
          **
        ***
      ****       
    *****
     
    *****
      ****
        ***
          **
            *

    i have made the two triangles the program goes like this.
    FOR LOOP.

    import java.io.*;
     
    public class NewClass {
     
        public static void main(String[] args) {
     
            for (int i = 1; i <= 5; i++) {
                for (int j = 1; j <= i; j++) {
                    System.out.print("*");
                }
                System.out.println(" ");
            }
            System.out.println("");
            for (int i = 1; i <= 5; i++) {
                for (int j = i; j <= 5; j++) {
                    System.out.print("*");
                }
                System.out.println(" ");
            }
     
        }
    }

    Please Help me i need it tomorrow

  2. The Following User Says Thank You to kramista For This Useful Post:

    Genky (August 20th, 2012)


  3. #2
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    Default Re: [HELP] TRIANGLE!

    i need the FOR LOOP of the other two triangles please help

  4. #3
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    Default Re: [HELP] TRIANGLE!

    So... whats the question?

  5. #4
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    Default Re: [HELP] TRIANGLE!

    whats the for loop of
            *
          **
        ***
      ****       
    *****
     
    *****
      ****
        ***
          **
            *

  6. #5
    Administrator copeg's Avatar
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    Default Re: [HELP] TRIANGLE!

    No one is going to do your homework for you, whether you need it by tomorrow or not. We may however, help you to learn...what is the expected output, and what are you getting?
    Last edited by copeg; July 28th, 2010 at 10:57 PM.

  7. #6
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    Default Re: [HELP] TRIANGLE!

    Hint:

    Look at the number of spaces to stars in each line. How do they change from line to line? Also, what are the initial conditions(initial number of spaces/stars)

    I'll let you figure out what the relationship is and how to implement these.

  8. #7
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    Default Re: [HELP] TRIANGLE!

    Its just an exercise that my brother is telling me. i got no idea so i ask. its a forum though, just asking!

    thanks helloworld922 but its much better if you tell me the answer.

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    Default Re: [HELP] TRIANGLE!

    please help me

  10. #9
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    Default Re: [HELP] TRIANGLE!

    Quote Originally Posted by kramista View Post
    Its just an exercise that my brother is telling me. i got no idea so i ask. its a forum though, just asking!
    If that's your small brother, stamp on him. If your big brother, prepare to be stamped on.

    And btw we've already heard pretty nearly all the "It's not homework!" disclaimers that have ever been thought of. So here's a challenge for you: come up with something uniquely entertaining and believable*, and I'll guide you till your code is complete.

    * Not "I'm teaching a class and need to know this myself' -- that's been used about a gazillion times.

    db

  11. #10
    mmm.. coffee JavaPF's Avatar
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    Default Re: [HELP] TRIANGLE!

    Tricky! Have you attempted this? Please post what code you have so we can guide you...
    Please use [highlight=Java] code [/highlight] tags when posting your code.
    Forum Tip: Add to peoples reputation by clicking the button on their useful posts.

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  12. #11
    Super Moderator helloworld922's Avatar
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    Default Re: [HELP] TRIANGLE!

    If it's a personal project, why would it be so urgent?

    If you do what I suggested, you should be able to see a very easy pattern to pick out, and then code your program to follow that pattern.

    Here's a sample of printing out an isoceles triangle.
       *
      ***
     *****
    *******

    Number of rows? n
    number of start spaces? n - 1
    number of start starts? 1
    how does the number of spaces change from row to row? each successive row has 1 less space
    how does the number of stars change from row to row? each successive row gets 2 more spaces

    Now, the pseudo-code:

    number of rows = n
    initial number of stars = 1
    initial number of spaces = rows - 1
    for every row:
    print out number of spaces spaces
    print out number of stars stars
    decrease number of spaces by 1
    increase number of stars by 2
    end for loop

    Now you apply this process to your problem.

  13. The Following 2 Users Say Thank You to helloworld922 For This Useful Post:

    Genky (August 18th, 2012), JavaPF (July 29th, 2010)

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