Graphing a sine/cosine/tan curves in C???

This is a discussion on Graphing a sine/cosine/tan curves in C??? within the C Programming forums, part of the General Programming Boards category; http://www.sci.brooklyn.cuny.edu/~sd.../Program6.html the link above are specifications to making a so called "simple" program, but how would this be done? especially ...

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    Question Graphing a sine/cosine/tan curves in C???

    http://www.sci.brooklyn.cuny.edu/~sd.../Program6.html

    the link above are specifications to making a so called "simple" program, but how would this be done? especially the graphing of sin, cos and tan?

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    Registered User hk_mp5kpdw's Avatar
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    graph(sin,0.0,10.0,20);
    You create a loop that goes from 0.0 to 10.0 (the example in the link I think got it wrong by saying 0.0 to 20.0) in increments of (hi-lo)/(num of points) so:

    Code:
    void graph( double (*func)(double),double lo,double hi, int number )
    {
        double pt;
        double inc = (hi-lo)/number;
    
        for( pt = lo; lo <= hi; pt += inc )
        {
            /* Call the function for the given pt value, you would need to
            do something with the return value, i.e. store it in an array perhaps
            for later use */
            func(pt);
        }
    
    }
    Once you've got all the values stored in an array, you need to normalize them based on the height of the screen display. Then it is a simple matter of going through the stored values in the array and outputting a symbol at the appropriate height based on the normalized value.
    Last edited by hk_mp5kpdw; 12-13-2005 at 05:28 AM.
    "Owners of dogs will have noticed that, if you provide them with food and water and shelter and affection, they will think you are god. Whereas owners of cats are compelled to realize that, if you provide them with food and water and shelter and affection, they draw the conclusion that they are gods."
    -Christopher Hitchens

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    how would you print an asterisk based on the height?

  4. #4
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    probably create a 2d char array:-

    Code:
    [ ][ ][ ][ ][ ][ ][ ]
    [ ][ ][ ][ ][ ][ ][ ]
    [ ][ ][ ][ ][ ][ ][ ]
    [ ][ ][ ][ ][ ][ ][ ]
    [ ][ ][ ][*][ ][ ][ ]
    [ ][*][*][ ][*][*][ ]
    [ ][*][ ][ ][ ][*][ ]
    Then print out the 2d array using a nested for loop.

    How you gets the stars into the array will be of course your main problem.

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