Accessing array members

This is a discussion on Accessing array members within the C Programming forums, part of the General Programming Boards category; Hello, are all the ways to access a member of a two-dimensional array listed below correct? I've tested the code ...

  1. #1
    kkk
    kkk is offline
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    Accessing array members

    Hello,

    are all the ways to access a member of a two-dimensional array listed below correct? I've tested the code and it seems to work properly.

    Code:
    void do_something(int (*ap)[COLUMNS], int rows, int columns)
    {
    	
       int x, i, j;
       ... // assume we've assigned some values to i and j here
       x = (*(ap+i))[j]);
       x = *(&ap[0][0] + i * columns +j));
       x = *(*(ap+i) + j));
       x = ap[i][j];
    }

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    Nov 2007
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    You need COLUMNS and columns to represent the same number, for sure. But if that's true, then those should all get you to the same place, should you ever use any of them, which is between you and your conscience.

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