Random number function

File for random.h

#include "random.h"

   /*****************************************************
   *                                                    *
   * File Name: random.h                                *
   * Author: Brenda Sonderegger                         *
   * Contents:                                          *
   *    get_random()                                    *
   *                                                    *
   *****************************************************/  



   /*****************************************************
   * int get_random(int low, int high)                  *
   * Author: Brenda Sonderegger                         *
   * Last Modified: Sept. 23, 1998                      *
   * Parameters: two integers                           *
   * Return value: random integer between low and high  *
   * Side Effect: none                                  *
   * Description: guarantees that the returned value is *
   *              between low and high inclusively      *
   * Functions called: from stdlib.h                    *
   *                       srand()                      *
   *                       rand()                       *
   *                   from time.h                      *
   *                       time()                       *
   *                                                    *
   *****************************************************/
int get_random(int low, int high);

File for random.c

#include "random.h"

   /*****************************************************
   *                                                    *
   * File Name: random.c                                *
   * Author: Brenda Sonderegger (all functions)         *
   * Contents:                                          *
   *    get_random()                                    *
   *                                                    *
   *****************************************************/  



   /*****************************************************
   * int get_random(int low, int high)                  *
   * Author: Brenda Sonderegger                         *
   * Last Modified: Sept. 23, 1998                      *
   * Parameters: two integers                           *
   * Return value: random integer between low and high  *
   * Side Effect: none                                  *
   * Description: guarantees that the returned value is *
   *              between low and high inclusively      *
   * Functions called: from stdlib.h                    *
   *                       srand()                      *
   *                       rand()                       *
   *                   from time.h                      *
   *                       time()                       *
   *                                                    *
   *****************************************************/
int get_random(int low, int high)
{
   static int seeded = 0;
   int random;

   if (seeded == 0)
   {
     srand((unsigned)time((time_t *) NULL));
     seeded = 1;
   } 
   random = rand() % (high - low + 1) + low;

   return (random);
}