#include <iostream>
int main(void)
{
    double a1 = 1, b1 = 4, a2 = 2, b2 = 3;

    double _a1, _b1, _a2, _b2;
 
    if (a1 > b1)
    {
        _a1 = b1;
        _b1 = a1;
    }
    else
    {
        _a1 = a1;
        _b1 = b1;
    }
 
    if (a2 > b2)
    {
        _a2 = b2;
        _b2 = a2;
    }
    else
    {
        _a2 = a2;
        _b2 = b2;
    }
 
    double a, b;
 
    a = _a2 > _a1? _a2 : _a1;
    b = _b2 < _b1? _b2 : _b1;
 
    if (a > b) std::cout << "no" << std::endl;
    else std::cout << "yes: " << a << ", " << b << std::endl;
 
    return 0;
}

yes: 2, 3