Generating a random number in a specified range and storing to a variable...

This is a discussion on Generating a random number in a specified range and storing to a variable... within the C++ Programming forums, part of the General Programming Boards category; Alright, here's another one for you guys thats got me absolutely stumped. Code: #include <stdio.h> #include <iostream.h> #include <stdlib.h> int ...

  1. #1
    Seven years? civix's Avatar
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    Generating a random number in a specified range and storing to a variable...

    Alright, here's another one for you guys thats got me absolutely stumped.

    Code:
    #include <stdio.h>
    #include <iostream.h>
    
    #include <stdlib.h>
    
    
    int random;
    
    int main ()
    {
    
    rand(random) &#37; 100;
    cout<<random<<endl;
    system("PAUSE");
    }
    It's output is zero. What am I doing wrong?

  2. #2
    Deathray Engineer MacGyver's Avatar
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    You're doing a bunch of things wrong. Read this:

    http://www.cplusplus.com/reference/c...dlib/rand.html

  3. #3
    Frequently Quite Prolix dwks's Avatar
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    Canada
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    And this: http://faq.cprogramming.com/cgi-bin/...&id=1043284385
    And then, if you're feeling adventurous, this: http://eternallyconfuzzled.com/arts/jsw_art_rand.aspx

    Other notes:
    • Don't use iostream.h -- it's nonstandard and antiquated. Use <iostream> and a using namespace std; statement instead. (The using statement itself is not the best idea, but one step at a time . . . .)
    • system("PAUSE"), though it works on Windows, is unportable, rather insecure, and quite slow. Consider some alternatives: cpwiki.sf.net/Pause_Console
    dwk

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