Question

初学，这段c语言什么意思？

/* shifts : 67108864 = 0x4000000, 9007199254740992 = 0x20000000000000 */
long a = rk_random(state) >> 5, b = rk_random(state) >> 6;
return (a * 67108864.0 + b) / 9007199254740992.0;
}

// Initialise the random generator with the specified seed
void rseed(unsigned long seed) {
rk_seed(seed,&localState);
//srand(seed);
}

unsigned long rndl() {
return rk_random(&localState);
}

// Returns a uniform distributed double value in the interval ]0,1[
double rnd() {
return rk_double(&localState);