37 lines
1.1 KiB
C++
37 lines
1.1 KiB
C++
#include <iostream>
|
|
|
|
using namespace std;
|
|
|
|
class RNG {
|
|
private:
|
|
/* Period parameters */
|
|
static const long N = 624;
|
|
static const long _M = 397;
|
|
static const unsigned long _MATRIX_A = 0x9908b0dfUL; /* constant vector a */
|
|
static const unsigned long _UPPER_MASK = 0x80000000UL; /* most significant w-r bits */
|
|
static const unsigned long _LOWER_MASK = 0x7fffffffUL; /* least significant r bits */
|
|
|
|
private:
|
|
unsigned long mt[N]; /* the array for the state vector */
|
|
int mti;
|
|
|
|
public:
|
|
RNG(unsigned long seed=5489UL);
|
|
RNG(unsigned long *init_key, int key_length);
|
|
|
|
void seed(unsigned long seed);
|
|
|
|
/* generates a random number on [0,0xffffffff]-interval */
|
|
unsigned long getInt32();
|
|
/* generates a random number on [0,0x7fffffff]-interval */
|
|
long getInt31();
|
|
/* generates a random number on [0,1]-real-interval */
|
|
double getDoubleLR();
|
|
float getFloatLR();
|
|
/* generates a random number on [0,1)-real-interval */
|
|
double getDoubleL();
|
|
float getFloatL();
|
|
/* generates a random number on (0,1)-real-interval */
|
|
double getDouble();
|
|
float getFloat();
|
|
};
|