#include#include int main() { std::error_code ec = std::make_error_code(std::errc::no_such_file_or_directory); std::cout << ec.message() << std::endl; return 0; }
#includeThis code creates an error_code object representing the error code "permission_denied". The if statement checks if the error_code object is not equal to a default-constructed error_code (i.e., if there is actually an error). If there is an error, it prints the error message to the standard error stream. This example is also using the system_error package library. Overall, std::error_code is a useful class for managing error codes and messages in a portable way across different systems and libraries. The system_error package library provides error handling functionality for the standard library, and there may be other libraries that use error_code as well.#include int main() { std::error_code ec = std::make_error_code(std::errc::permission_denied); if (ec) { std::cerr << "Error: " << ec.message() << std::endl; } return 0; }