random()

const mpreal mpfr::random ( unsigned int seed = 0 )

inline

Definition at line 2858 of file mpreal.h.

{
#if (MPFR_VERSION >= MPFR_VERSION_NUM(3,0,0))
    static gmp_randstate_t state;
    static bool initialize = true;
 
    if(initialize)
    {
        gmp_randinit_default(state);
        gmp_randseed_ui(state,0);
        initialize = false;
    }
 
    if(seed != 0) gmp_randseed_ui(state,seed);
 
    return mpfr::urandom(state);
#else
    if(seed != 0)    std::srand(seed);
    return mpfr::mpreal(std::rand()/(double)RAND_MAX);
#endif
}