Simple Eye-Candy program

This is a discussion on Simple Eye-Candy program within the C Programming forums, part of the General Programming Boards category; I'm going to pull my hair out!! I don't know what they hell is wrong with this simple program! I ...

  1. #1
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    Jun 2004
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    14

    Angry Simple Eye-Candy program

    I'm going to pull my hair out!! I don't know what they hell is wrong with this simple program! I can't compile it, cuz it gives me the error: "Line 18, missing terminating ' character"

    Code:
    #include <stdio.h>
    
    #define POSITIVE '\'
    #define NEGATIVE 32
    #define COLUMN_WIDTH 40
    #define MAXLINES 100000
    
    main()
    {
        int c; /* character count */
        int l; /* line count */
        int p=0; /* positive value */
        
        for (l=1; l<=MAXLINES; ++l) {
            ++p;                    /* EQUATION */
            for (c=1; c!=p; ++c) {
                    putchar(NEGATIVE);
                    if (c > COLUMN_WIDTH) {
                                    c = COLUMN_WIDTH - c;
                    }
            }
            putchar(POSITIVE);
            putchar('\n');
        }
    }
    Line 18 is
    Code:
                    if (c > COLUMN_WIDTH) {
    I have no idea what's wrong, and it's driving me crazy.

    Anyone have ideas?

  2. #2
    .
    Join Date
    Nov 2003
    Posts
    307
    Code:
    #include <stdio.h>
    
    #define POSITIVE '\\'           // <--------- change
    #define NEGATIVE 32
    #define COLUMN_WIDTH 40
    #define MAXLINES 10
    
    main()
    {
        int c; /* character count */
        int l; /* line count */
        int p=0; /* positive value */
        
        for (l=1; l<=MAXLINES; ++l) {
            ++p;                    /* EQUATION */
            for (c=1; c!=p; ++c) {
                    putchar(NEGATIVE);
                    if (c > COLUMN_WIDTH) {
                                    c = COLUMN_WIDTH - c;
                    }
            }
            putchar(POSITIVE);
            putchar('\n');
        }
    }

  3. #3
    Registered User
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    Awesome, thanks. Now the program isn't doing exactly what I wanted to.. but I'll try and figure that out.

    Thank you.

  4. #4
    Registered User
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    Jun 2004
    Posts
    14
    Okay got it to work, here's my code:

    Code:
    #include <stdio.h>
    
    #define POSITIVE 'X'
    #define NEGATIVE 32
    #define COLUMN_WIDTH 20
    #define MAXLINES 100000
    #define EQUATION ++p
    
    main()
    {
        int c; /* character count */
        int l; /* line count */
        int p=0; /* positive value */
        
        for (l=1; l<=MAXLINES; ++l) {
            EQUATION;                    /* EQUATION */
            p %= COLUMN_WIDTH;
            for (c=0; c!=p; ++c) {
                    putchar(NEGATIVE);
            }
            putchar(POSITIVE);
            putchar('\n');
        }
    }
    The idea of this program is to experiment by defining different equations.

    Problem is, the thing zips by so freaking fast that you can't even see the pattern. Is there a way I can control the speed of it?

  5. #5
    .
    Join Date
    Nov 2003
    Posts
    307
    Try:
    Put in an fgets() call every 24 lines or so....

  6. #6
    Registered User Draco's Avatar
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    463

  7. #7
    #include<xErath.h> xErath's Avatar
    Join Date
    Jun 2004
    Posts
    722
    I wouldn't advise using those sleeping functions because they are always runing and spent lots of CPU. Instead you could use the delay() function from the std libraries, although I think it's not ANSI C. This funtion uses the 0x15 interrupt to relinquish the CPU to other programs that might need it. If you're using VC++ you can use Sleep(), in windows.h, which does the same thing, but using the OS services.
    If you're using VC++, or Borland c++ builder, or another IDE insert breakpoints throughout your code and debug it.

    e.g.: if you do Sleep(500), your program stays idle for half second, and spents 0% CPU.

    //edit
    I had some porblems using the delay function in Windows XP: the time specified seems to be ignored, and the functions does nothing. Use Sleep instead: this works fine.

  8. #8
    ---
    Join Date
    May 2004
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    int main()
    {
    ...
    return 0;
    }

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