How to check for math error in C++

matherror.cpp

// Checking for math error in C++

#include <cerrno>
#include <cmath>
#include <cstring>
#include <iostream>

std::cout << log(0) << std::endl;
if (errno)
    std::cout << std::strerror(errno) << std::endl;
if (errno == EDOM)
    std::cout << "Domain error\n";
if (errno == ERANGE)
    std::cout << "Range error\n";