[C++ libs usage]

libs.cpp

// all libs
// https://en.cppreference.com/w/cpp/header


////////////
#include <iostream>

    std::cout << "Hello, world!" << std::endl;


////////////
// https://en.cppreference.com/w/cpp/error/assert
// uncomment to disable assert()
// #define NDEBUG
#include <cassert>
assert(1 == 2);

////////////
// https://en.cppreference.com/w/cpp/utility/program/abort
#include <cstdlib>

// normal termination
std::exit(EXIT_SUCCESS)
std::exit(EXIT_FAILURE)
// abnormal termination without cleanup
std::abort(); 


////////////
// https://en.cppreference.com/w/cpp/error/errc
<system_error>
std::error_code error_code
if (error_code == std::errc::invalid_argument)...