#include <time.h>                // for time()
#include <limits.h>              // for INT_MAX
#include <stdlib.h>              // for rand/srand
#include "rando.h"

int RandGen::initialized = 0;

RandGen::RandGen()
// postcondition: system srandom used to initialize seed
//                once per program     
{
    if (0 == initialized){
	initialized = 1;      // only call srand once
	srand(time(0));       // randomize
    }
}

int RandGen::RandInt(int max)
// precondition: max > 0
// postcondition: returns int in [0..max)     
{  
    return rand() % max;
}

int RandGen::RandInt(int low, int max)
// precondition: low <= max     
// postcondition: returns int in [low..max]     
{ 
    return low + RandInt(max-low+1);
}

double RandGen::RandReal()
// postcondition: returns double in [0..1)     
{     
    return RandInt() / double(INT_MAX);		       
}