random.cpp

#include "random.h"

#include <stdlib.h>


//use this first to seed the random number generator,
//call this before any of the other functions
Random::Random(int seedTime)
{
    //ctor
  //  srand(seedTime);
}

Random::~Random()
{
    //dtor
}



//generates a psuedo-random integer between 0 and 32767
int Random::randint()
{
    return rand();
}

//generates a psuedo-random integer between 0 and max
int Random::randint(int max)
{
    return (int) (max*rand()/(RAND_MAX+1.0));
}

//generates a psuedo-random integer between min and max
int Random::randint(int min, int max)
{
    if (min>max)
    {
        return max + (int) ((min-max+1)*rand()/(RAND_MAX+1.0));
    }
    else
    {
        return min + (int) ((max-min+1)*rand()/(RAND_MAX+1.0));
    }
}

//generates a psuedo-random float between 0.0 and 0.999...
float Random::randfloat()
{
    return rand()/((float)(RAND_MAX)+1);
}

//generates a psuedo-random float between 0.0 and max
float Random::randfloat(float max)
{
    return randfloat()*max;
}

//generates a psuedo-random float between min and max
float Random::randfloat(float min, float max)
{
    if (min>max)
    {
        return randfloat()*(min-max)+max;
    }
    else
    {
        return randfloat()*(max-min)+min;
    }
}

//generates a psuedo-random double between 0.0 and 0.999...
double Random::randdouble()
{
    return rand()/((double)(RAND_MAX)+1);
}

//generates a psuedo-random double between 0.0 and max
double Random::randdouble(double max)
{
    return randdouble()*max;
}

//generates a psuedo-random double between min and max
double Random::randdouble(double min, double max)
{
    if (min>max)
    {
        return randdouble()*(min-max)+max;
    }
    else
    {
        return randdouble()*(max-min)+min;
    }
}

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