What are some advanced examples of function pointers in C++?

What are some advanced examples of function pointers in C++?

Function pointers in C++ can be used for callbacks, event handling, and implementing polymorphism. For example, you can create a function pointer that points to different sorting algorithms based on user input.

Can you show me a code example of using function pointers for sorting?

Sure! Here's a simple example:

#include <iostream>
#include <algorithm>

void bubbleSort(int arr[], int n) {
    // Bubble sort implementation
}

void quickSort(int arr[], int n) {
    // Quick sort implementation
}

void sortArray(int arr[], int n, void (*sortFunc)(int[], int)) {
    sortFunc(arr, n);
}

int main() {
    int arr[] = {5, 2, 9, 1, 5, 6};
    int n = sizeof(arr) / sizeof(arr[0]);
    sortArray(arr, n, bubbleSort); // Using bubble sort
    // sortArray(arr, n, quickSort); // Uncomment to use quick sort
}

This code defines a function pointer that can point to either bubbleSort or quickSort.

What are the advantages of using function pointers?

Function pointers provide flexibility and allow for dynamic function calls, enabling features like callbacks and event-driven programming. They also help in reducing code duplication by allowing the same function to handle different operations based on the function pointer passed.