n00b rand question

This is a discussion on n00b rand question within the C Programming forums, part of the General Programming Boards category; I'm a C programming class, and I have an assignment due tonight at midnight, but I can't get my rand() ...

  1. #1
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    Question n00b rand question

    I'm a C programming class, and I have an assignment due tonight at midnight, but I can't get my rand() to work. I know its a little stupid thing, but it baffles me.

    Here is are the parameters given to us by the professor:

    I need a random number between 0 and 63.
    Using a defined RANGE value (set at 64) and using the modulus (%) operator, ensure that the value is different every time the program is started and can include 0 and 63 as values.
    Also, you must use the srand(time(null)) seed function.

    all in all, I need something that doesn't require making a new .h file or using two void satements. and the random number has to be set to x.

    I pray someone can help me fast.
    thanks all.

  2. #2
    Handy Andy andyhunter's Avatar
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    i don't think most standard compilers support programmers with more than 4 red boxes - Misplaced

    It is my sacred duity to stand in the path of the flood of ignorance and blatant stupidity... - quzah

    Such pointless tricks ceased to be interesting or useful when we came down from the trees and started using higher level languages. - Salem

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    Thanks a lot, but I still can't get it to only pick numbers between 0 and 63. I'm so stupid.
    Last edited by SINISTAR556; 02-13-2005 at 07:55 PM.

  4. #4
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    It's all in the FAQ andyhunter posted. If you still can't get it to work, then I'm sorry to say that there is no hope for you.

  5. #5
    former member Brain Cell's Avatar
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    Quote Originally Posted by SINISTAR556
    Thanks a lot, but I still can't get it to only pick numbers between 0 and 63. I'm so stupid.
    How about you show us what you've done so far?
    My Tutorials :
    - Bad programming practices in : C
    - C\C++ Tips
    (constrcutive criticism is very welcome)


    - Brain Cell

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    Code:
    
    #include <time.h>
    #include <stdlib.h>
    
    int
    main(int argc, char **argv)  {
    
           int random = 0;
          /* initialize the random starting pointer */
         srand(time(NULL));
    
          ... statements here  ...
    
         /* generate a random number */
          random = rand()%64;
          ...   statements ...
          return 0;
    }
    There, that should work. All it does is modulus the output from rand() by 64, there fore making the number only be between 0 and 63 (including those)

    hope youmeant tonight at midnight...

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