How do I define default arguments properly?

In C++, default arguments allow you to specify a value for a function parameter, which will be used if no argument is provided when the function is called. This feature can enhance code readability and reduce the number of function overloads needed. Below is an example demonstrating how to correctly define default arguments in C++.


        #include <iostream>

        void printMessage(std::string message = "Hello, world!") {
            std::cout << message << std::endl;
        }

        int main() {
            printMessage(); // Uses default argument
            printMessage("Custom message"); // Uses provided argument
            return 0;
        }