einstein/random.h

42 lines
1.1 KiB
C++

#ifndef __RANDOM_H__
#define __RANDOM_H__
class Random
{
private:
#define RAND_N 624
unsigned long mt[RAND_N]; /* the array for the state vector */
int mti; /* mti==RAND_N+1 means mt[RAND_N] is not initialized */
public:
Random();
Random(unsigned long int seed);
Random(int keys[], int length);
~Random();
public:
/* generates a random number on [0,0xffffffff]-interval */
unsigned long int genInt32();
/* generates a random number on [0,0x7fffffff]-interval */
long int genInt31();
/* generates a random number on [0,1]-real-interval */
double genReal1();
/* generates a random number on [0,1)-real-interval */
double genReal2();
/* generates a random number on (0,1)-real-interval */
double genReal3();
/* generates a random number on [0,1) with 53-bit resolution*/
double genReal53();
/* generate integer random number on [0, range) int interval */
int genInt(int range);
private:
void initLong(unsigned long int s);
};
#endif