Arrays as function arguments!

This is a discussion on Arrays as function arguments! within the C Programming forums, part of the General Programming Boards category; Hi all!! I have a problem. I have to write a program that initialises a 2 dimensional arrayof double and ...

  1. #1
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    Arrays as function arguments!

    Hi all!!

    I have a problem. I have to write a program that initialises a 2 dimensional arrayof double and uses a function to copy the sub-arrays of this 2 dimensional function one-by-one in to a seperate array.

    please help. ive spent all day on this and wrote so many variations.
    I can copy a 2 dimensional array within the main function, like so...

    #include <stdio.h>
    #define SIZEA 2
    #define SIZEB 4



    Code:
    main()
    {
    	int i, j;
          double destination2[SIZEA][SIZEB];
          double source[SIZEA][SIZEB]=
    	  {
    		  {5, 3, 6, 7},
    		  {3, 15, 12, 4}
    	  };
    
    	   for(i=0; i<SIZEA; i++)
    	   {
    			for(j=0; j<SIZEB; j++)
    			{
    			destination2[i][j]= source[i][j];
    			printf("%.2f\n", destination2 [i][j]);
    			}
    			printf("\n");
    	   }
    
    }


    but this isnt what the question asks for and im really stuck.

    Thanks in advance

    Stuart

  2. #2
    and the hat of int overfl Salem's Avatar
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    An easy rule to remember is copy/paste

    Code:
    void copyArray ( double destination2[SIZEA][SIZEB], double source[SIZEA][SIZEB] ) {
      // your two loops here
    }
    Which you would call with
    Code:
    copyArray( destination2, source );
    You can of course rename the formal parameters if you want to, to be more descriptive in the function body.

    You can also omit the LEFT-MOST array size as well.
    Code:
    void copyArray ( double destination2[][SIZEB], double source[][SIZEB] ) {
      // your two loops here
    }
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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  3. #3
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    thanks a bundle m8!!!

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