C++ (Cpp) bernoulli_fmpq_ui Examples

Example #1

File: ntheory.cpp Project: ivme/symengine

RCP<const Number> bernoulli(unsigned long n)
{
#ifdef HAVE_SYMENGINE_ARB
    fmpq_t res;
    fmpq_init(res);
    bernoulli_fmpq_ui(res, n);
    mpq_t a;
    mpq_init(a);
    fmpq_get_mpq(a, res);
    rational_class b(a);
    fmpq_clear(res);
    mpq_clear(a);
    return Rational::from_mpq(std::move(b));
#else
    // TODO: implement a faster algorithm
    std::vector<rational_class> v(n + 1);
    for (unsigned m = 0; m <= n; ++m) {
        v[m] = rational_class(1, m + 1);

        for (unsigned j = m; j >= 1; --j) {
            v[j - 1] = j * (v[j - 1] - v[j]);
        }
    }
    return Rational::from_mpq(v[0]);
#endif
}

Example #2

File: ntheory.cpp Project: nitish-mittal/csympy

RCP<const Number> bernoulli(ulong n)
{
#ifdef HAVE_CSYMPY_ARB
    fmpq_t res;
    fmpq_init(res);
    bernoulli_fmpq_ui(res, n);
    mpq_t a;
    mpq_init(a);
    fmpq_get_mpq(a, res);
    mpq_class b (a);
    fmpq_clear(res);
    mpq_clear(a);
    return Rational::from_mpq(b);
#else
    throw std::runtime_error("Currently supported only if ARB is installed");
#endif
}