Passing a double array to a function as an argument

This is a discussion on Passing a double array to a function as an argument within the C++ Programming forums, part of the General Programming Boards category; Code: points[1][1] = 1; points[1][2] = 2; points[1][3] = 3; points[1][4] = 4; points[2][1] = 5; points[2][2] = 6; points[2][3] ...

  1. #16
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    Code:
    	points[1][1] = 1;
    	points[1][2] = 2;
    	points[1][3] = 3;
    	points[1][4] = 4;
    	points[2][1] = 5;
    	points[2][2] = 6;
    	points[2][3] = 7;
    	points[2][4] = 8;
    	points[3][1] = 9;
    	points[3][2] = 10;
    	points[3][3] = 11;
    	points[3][4] = 12;
    
    	nextpoint[1][1] = 1;
    	nextpoint[1][2] = 2;
    	nextpoint[1][3] = 3;
    	nextpoint[1][4] = 4;
    	nextpoint[2][1] = 5;
        nextpoint[2][2] = 6;
        nextpoint[2][3] = 7;
    	nextpoint[2][4] = 8;
        nextpoint[3][1] = 9;
    	nextpoint[3][2] = 10;
        nextpoint[3][3] = 11;
        nextpoint[3][4] = 12;
    Arrays indices in C++ start at 0, so you must either expand your array, or change your initialization.
    > int points[3][4];
    This array goes from [0 thru 2][0 thru 3], so:
    Code:
    	points[0][0] = 1;
    	points[0][1] = 2;
    	points[0][2] = 3;
    	points[0][3] = 4;
    	points[1][0] = 5;
    	points[1][1] = 6;
    	points[1][2] = 7;
    	points[1][3] = 8;
    	points[2][0] = 9;
    	points[2][1] = 10;
    	points[2][2] = 11;
    	points[2][3] = 12;
    
    	nextpoint[0][0] = 1;
    	nextpoint[0][1] = 2;
    	nextpoint[0][2] = 3;
    	nextpoint[0][3] = 4;
    	nextpoint[1][0] = 5;
    	nextpoint[1][1] = 6;
    	nextpoint[1][2] = 7;
    	nextpoint[1][3] = 8;
    	nextpoint[2][0] = 9;
    	nextpoint[2][1] = 10;
    	nextpoint[2][2] = 11;
    	nextpoint[2][3] = 12;

  2. #17
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    Also since you're checking attempt back in main(), you should pass this as a reference:

    void directionfunct(int &x, int &y, int coords[][13], int &letters, int ans,int cx, int cy, int j, int answer[12], int &ax, int &ay, int &attempt )

  3. #18
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    Actually you may need to pass everything as a reference:

    void directionfunct(int &x, int &y, int coords[][13], int &letters, int &ans,int &cx, int &cy, int &j, int answer[12], int &ax, int &ay, int &attempt)

  4. #19
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    Personally, I'd say that function (directionfunct) has way too many parameters. Also, the names of the parameters looks way to confusing too. But hey, it's your prog
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

  5. #20
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    Yes, it does have a lot of parameters, that is because I want to increment and decrement things, and it would be harder to do if the declaration is inside of the loop.

    I guess I will increase the array, I just like to start at 1.

  6. #21
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    Just posting the updated code before I stop programming for tonight.
    Attached Files Attached Files
    Last edited by Glirk Dient; 09-10-2003 at 03:19 PM.

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