Can you explain the concept of automatic resource management in C++ and the underlying principle of this approach?

Automatic resource management in C++ is implemented through the RAII (Resource Acquisition Is Initialization) idiom. The essence is that a resource (such as memory, a file, a mutex) is tied to the lifetime of an object: the resource is acquired (initialized) in the constructor, and released in the destructor.

This guarantees that resources will be properly released when exiting the scope, even if an exception occurs.

Example:

#include <fstream>

void example() {
    std::ifstream file("data.txt"); // file is opened in the constructor
    if (!file) {
        // error handling
        return;
    }
    // work with the file
    // when exiting the function, the ifstream destructor automatically closes the file
}

Thus, RAII provides safe and convenient resource management without the need to explicitly call release functions.