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What is Multi Dimensional Array?

This is a discussion on What is Multi Dimensional Array? within the C Programming forums, part of the General Programming Boards category; Read the code below, Code: int main() {int a[3][3],i,j; {for(i=0;i<3;i++) for(j=0;j<3;j++) a[i][j] = 0;} printf("a[i][j] =%d\n",a[i][j]); return EXIT_SUCCESS;} i find ...

  1. #1
    Registered User loserone+_+'s Avatar
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    Post What is Multi Dimensional Array?

    Read the code below,
    Code:
    int main()
    {int a[3][3],i,j;
     {for(i=0;i<3;i++)
      for(j=0;j<3;j++)
      a[i][j] = 0;}
      printf("a[i][j] =%d\n",a[i][j]);
      return EXIT_SUCCESS;}
    i find it on c ebooks for android phone,
    its called multi dimensional array, but when i make a trial and error program
    the result of a[i][j] = 2293576
    the result was syntac error right?
    i didnt get was the multi dimensional array mean,

  2. #2
    SAMARAS std10093's Avatar
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    Of course! There is a logical error on this code.

    What is the values of i and j when you reach the printf ?

    Then think what element of the array(if any) these values represent.
    Code - functions and small libraries I use


    It’s 2014 and I still use printf() for debugging.


    "Programs must be written for people to read, and only incidentally for machines to execute. " —Harold Abelson

  3. #3
    Registered User loserone+_+'s Avatar
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    yeahh i already figured it out,
    when i am using printf to i and j,
    it prints out 3 number,
    but i didnt get multi dimensional array things from my ebooks says,
    and why a didnt get any values?

  4. #4
    SAMARAS std10093's Avatar
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    Let me rephrase the question.

    If I want to print the left top element of a 2D array, I would do
    Code:
    i = 0;
    j = 0;
    printf("a[i][j] =%d\n",a[i][j]);
    So this code would print me the a[0][0] element.

    In the code you have in the first example, in which element is the a[i][j]?

    I think that way you really learn to debug, so please don't throw away the answer (for the other members).
    Code - functions and small libraries I use


    It’s 2014 and I still use printf() for debugging.


    "Programs must be written for people to read, and only incidentally for machines to execute. " —Harold Abelson

  5. #5
    Registered User
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    Quote Originally Posted by loserone+_+ View Post
    Read the code below,
    Now fixed:
    Code:
    int main()
    {  int a[3][3],i,j;
      
       for(i=0;i<3;i++) {
          for(j=0;j<3;j++) {
             a[i][j] = 0;
             
          }
       }
       return EXIT_SUCCESS;
    }
    i find it on c ebooks for android phone,
    its called multi dimensional array, but when i make a trial and error program
    The result was syntac error right?
    i didnt get was the multi dimensional array mean,
    Yes. It had an error. Now, where should that print statement go?

    A one dimensional array has length - like one line of text.

    A two dimensional array has length and width - like a table on a spreadsheet, or a page of text.

    A three dimensional array has length, width, and depth (or height) like several pages of text in a notebook, pad, or book.
    Last edited by Adak; 01-29-2013 at 07:31 AM.
    Crossfire likes this.

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