From:	"Rafał Maj" <r_maj AT poczta DOT onet DOT pl>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Random numbers
Date:	Thu, 17 Aug 2000 17:10:05 +0200
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User <dots AT hotmail DOT comPOF> wrote
> How can i make a function
> that gives a random number in different ranges?
> Eg. Rand(Min,Max)
> would give a random number between Min and Max.

If You want only to have only integer numbers :
  int rnd(int min, int max) { return (random() % (max-min+1)) + min; }

If You alsow want use float, then ther is whole program :

#include <iostream.h>
#include <stdlib.h>
#include <math.h>
float rnd_one() { return (random()%10001)/10000.0; } // helper function
float rnd_float(float min, float max) {
  float f = (rnd_one()/10000.0 + rnd_one() + rnd_one()*10000);
  return fmod(f,max-min) + min;
}

main() {
  cerr<<"Integer : "<<endl;
  for (int i=0; i<25; i++) cerr << rnd(5,10) << endl;
  cerr<<"\n\nFloat : "<<endl;
  for (int i=0; i<100; i++) cerr << rnd_float(1.50, 1.60) << endl;
}

Rafal

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