Passing 2D array to a function

This is a discussion on Passing 2D array to a function within the C Programming forums, part of the General Programming Boards category; Edit: Thanks for all the answers. Hi, How do I pass 2D array to a function correctly? Here's my code ...

  1. #1
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    [Solved] Passing 2D array to a function

    Edit: Thanks for all the answers.

    Hi,

    How do I pass 2D array to a function correctly?

    Here's my code which doesn't work.

    Code:
    #include <stdlib.h>
    #include <stdio.h>
    
    #define MAX_ROW    2
    #define MAX_COLUMN 2
    
    void display_seats(char **);
    
    int main(void)
    {
        char seats[MAX_ROW][MAX_COLUMN] = { 0 };
    //    int input_row, input_column;
        int i, j;
        
        /* Init the row  and columns */
        for(i = 0; i < MAX_ROW; i++)
        {
            for(j = 0; j < MAX_COLUMN; j++)
            {                        
                seats[i][j] = 'X';
            }   
        }
    
        display_seats(seats);
    
        return EXIT_SUCCESS;
    }
    
    void display_seats(char **seats)
    {
        int i, j;
        
        for(i = 0; i < MAX_ROW; i++)
        {
            for(j = 0; j < MAX_COLUMN; j++)
            {                        
                printf("%c", seats[i][j]);
            }
            printf("\n");   
        }
    }
    MSVC++ 6 gives me two warnings,
    warning C4047: 'function' : 'char ** ' differs in levels of indirection from 'char [2][2]'
    warning C4024: 'display_seats' : different types for formal and actual parameter 1

    Thanks.
    Last edited by Krupux; 09-04-2003 at 07:55 PM.

  2. #2
    Wannabe Coding God
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    &seats[0] - I think that should work
    They say that if you play a Windows Install CD backwords, you hear satanic messages. That's nothing; play it forward and it installs Windows.

  3. #3
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    Originally posted by Shogun
    &seats[0] - I think that should work
    Hi,

    If you mean
    Code:
    display_seats(&seats[0]);
    That doesn't work...

  4. #4
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    Originally posted by Salem
    Definition and declaration should be
    Code:
    void display_seats(char seats[][MAX_COLUMN]);
    Hi,

    Yes that works. Thanks.

    Any reason why it has to be declared/used that way? and not

    Code:
    void display_seats(char **seats);

  5. #5
    Just Lurking Dave_Sinkula's Avatar
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    >Any reason why it has to be declared/used that way?

    http://www.eskimo.com/~scs/C-faq/q6.18.html
    7. It is easier to write an incorrect program than understand a correct one.
    40. There are two ways to write error-free programs; only the third one works.*

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