/* * File: random.c * Version: 1.0 * Last modified on Mon Sep 13 10:42:45 1993 by eroberts * ----------------------------------------------------- * This file implements the random.h interface. */#include <stdio.h>#include <stdlib.h>#include <time.h>#include "genlib.h"#include "random.h"/* * Function: Randomize * ------------------- * This function operates by setting the random number * seed to the current time.  The srand function is * provided by the <stdlib.h> library and requires an * integer argument.  The time function is provided * by <time.h>. */void Randomize(void){    srand((int) time(NULL));}/* * Function: RandomInteger * ----------------------- * This function first obtains a random integer in * the range [0..RAND_MAX] by applying four steps: * (1) Generate a real number between 0 and 1. * (2) Scale it to the appropriate range size. * (3) Truncate the value to an integer. * (4) Translate it to the appropriate starting point. */int RandomInteger(int low, int high){    int k;    double d;    d = (double) rand() / ((double) RAND_MAX + 1);    k = (int) (d * (high - low + 1));    return (low + k);}/* * Function: RandomReal * -------------------- * The implementation of RandomReal is similar to that * of RandomInteger, without the truncation step. */double RandomReal(double low, double high){    double d;    d = (double) rand() / ((double) RAND_MAX + 1);    return (low + d * (high - low));}/* * Function: RandomChance * ---------------------- * This function uses RandomReal to generate a number * between 0 and 100, which it then compares to p. */bool RandomChance(double p){    return (RandomReal(0, 1) < p);}