Help with DarkGDK pogramming

This is a discussion on Help with DarkGDK pogramming within the C++ Programming forums, part of the General Programming Boards category; I am new to programming so I dont know a whole lot yet, but I start working on an assignment ...

  1. #1
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    Help with DarkGDK pogramming

    I am new to programming so I dont know a whole lot yet, but I start working on an assignment for my programming class and have hit a few snags...

    Here is the problem from the book:

    In a program write a function named drawPattern. The draw function should accept two arguments: one for the patterns width and another for the height. When the program runs the darkgdk function should ask the user for the width and height of the pattern, and then pass these values as arugments to the drawpattern function.

    so far I got:
    Code:
    #include "DarkGDK.h"
    
    void __cdecl drawPattern(int);
    
    void DarkGDK()
    {
    	drawPattern(100);
    
    	dbWaitKey();
    
    }
    
    void drawPattern(int width, int height)
    {
    	int height = dbScreenHeight();
    	int width = dbScreenWidth();
    
    	int x = width/2;
    	int y = height/2;
    
    	dbPattern(x,y,x,y);
    
    }
    Any help would be much appreciated.
    Last edited by Salem; 09-20-2010 at 11:52 PM. Reason: Added code tags - learn to use them yourself

  2. #2
    and the hat of int overfl Salem's Avatar
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    Instead of going for the whole pattern right away, how about something simpler like
    - a pixel
    - a line
    - a triangle
    etc
    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.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  3. #3
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    I have worked my way through that and have pretty much breezed through the book up til this point....

  4. #4
    and the hat of int overfl Salem's Avatar
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    Perhaps you should breeze through it a bit more thoroughly then.

    Because "easy", "easy", "easy" then "clueless" means you probably missed something along the way.

    Did you try the examples (or questions) in previous chapters?
    Did you try to modify them?
    Did you try to break them?
    If not, then I'd say you're moving too fast.
    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.
    I support http://www.ukip.org/ as the first necessary step to a free Europe.

  5. #5
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    Ok so been kinda working through it and I got this much now:

    #include "DarkGDK.h"

    void drawPattern(int, int);

    void DarkGDK()
    {
    int firstNum, secondNum;

    dbPrint("Enter the patterns width:");
    firstNum = atoi(dbInput());

    dbPrint("Enter the patterns height:");
    secondNum = atoi(dbInput());

    }

    void drawPattern(int firstNum, int secondNum)
    {
    DWORD white = dbRGB(255,250,250);
    DWORD black = dbRGB(0,0,0);

    dbClear(255,250,250);

    dbInk(black, white);

    dbLine(0,0,640,480);
    dbLine(640,0,0,480);
    dbLine(320,0,320,480);
    dbLine(0,240,640,240);


    dbInk(black, black);
    dbBox(int firstNum, int secondNum);


    dbWaitKey();

    }

    but what I cant seem to figure out is how to create the dbBox in the center of the screen with just the two inputs given by the user....

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