#include#include int main() { std::ifstream file("example.txt"); if (file.is_open()) { std::cout << "File is open." << std::endl; } else { std::cout << "File is not open." << std::endl; } return 0; }
#includeThis code checks if the file "example.txt" exists and is open for input operations. However, it uses the Boost C++ Libraries to work with files. First, it creates a `boost::filesystem::path` object with the file path, and then converts it to a string to use with `std::ifstream`.#include #include int main() { boost::filesystem::path file_path("example.txt"); std::ifstream file(file_path.string()); if (file.is_open()) { std::cout << "File is open." << std::endl; } else { std::cout << "File is not open." << std::endl; } return 0; }