How do I use function pointers and std::function?

In C++, function pointers and `std::function` are powerful tools that allow you to store and invoke functions dynamically. Function pointers are a way to point to functions, while `std::function` provides a more flexible and type-safe way to encapsulate callable entities.

Function Pointers

A function pointer can point to a function of a specific signature. This allows you to call different functions dynamically depending on certain conditions.

Using std::function

`std::function` is a part of the C++ Standard Library that can store any callable target, such as functions, lambda expressions, or bind expressions. It provides a convenient way to handle callbacks.

Example


        #include <iostream>
        #include <functional>

        // Function to be used
        void printMessage(const std::string &message) {
            std::cout << "Message: " << message << std::endl;
        }

        int main() {
            // Using function pointer
            void (*funcPtr)(const std::string &) = printMessage;
            funcPtr("Hello from function pointer!");

            // Using std::function
            std::function funcObj = printMessage;
            funcObj("Hello from std::function!");

            return 0;
        }

How do I use function pointers and std::function?

Function Pointers

Using std::function

Example

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How do I use function pointers and std::function?

Function Pointers

Using std::function

Example

Related Questions

Popular Topics

Recent Languages