int main() {
        const auto inf = std::numeric_limits<double>::infinity();
        print(_MSC_VER);
        print(atan2(inf, inf));
        print(atan2(-inf, -inf));
        print(atan2(inf, -inf));
        print(fmod(10.0, inf));
        print(fmod(10.0, -inf));

        return 0;
}

_MSC_VER: 1920
atan2(inf, inf): 0.785398
atan2(-inf, -inf): -2.35619
atan2(inf, -inf): 2.35619
fmod(10.0, inf): 10
fmod(10.0, -inf): 10