C++ Function Pointers vs Regular Functions

What are the main differences between function pointers and regular functions in C++?

Function pointers are variables that store the address of a function, allowing dynamic function calls. Regular functions are defined with a specific signature and are called directly.

Can you give me an example of how to use function pointers?

Sure! Here's a simple example:

#include <iostream>

void greet() {
    std::cout << "Hello!" << std::endl;
}

int main() {
    void (*funcPtr)() = &greet; // Function pointer
    funcPtr(); // Calling the function using the pointer
    return 0;
}

What are the advantages of using function pointers?

Function pointers allow for more flexible code, enabling callbacks and dynamic function selection at runtime, which can lead to more modular designs.

Are there any downsides to using function pointers?

Yes, function pointers can make code harder to read and maintain. They also introduce potential risks like dereferencing null pointers if not handled carefully.