What are some examples of callbacks in C++?

What are some examples of callbacks in C++?

Callbacks in C++ are functions that are passed as arguments to other functions. They allow for flexible and reusable code. For example, you can use function pointers or std::function to implement callbacks.

Can you show me a simple code example?

Sure! Here's a simple example:

#include <iostream>

void callbackFunction(int x) {
    std::cout << "Callback called with value: " << x << std::endl;
}

void performAction(void (*callback)(int), int value) {
    callback(value);
}

int main() {
    performAction(callbackFunction, 10);
    return 0;
}
}

What if I want to use a lambda function as a callback?

You can use lambda functions in C++ as callbacks too! Here's an example:

#include <iostream>

void performAction(const std::function<void(int)>& callback, int value) {
    callback(value);
}

int main() {
    performAction([](int x) { std::cout << "Lambda callback called with value: " << x << std::endl; }, 20);
    return 0;
}