Function Pointers and Callbacks in C

 Function Pointers and Callbacks in C

Function pointers allow you to store the address of a function and invoke it later. They are particularly useful when combined with callback mechanisms, where functions can be passed as arguments to other functions.

#include <stdio.h>

int add(int a, int b) {

    return a + b;

}

int subtract(int a, int b) {

    return a - b;

}

int calculator(int (*operation)(int, int), int a, int b) {

    return operation(a, b);

}

int main() {

    int result1 = calculator(add, 5, 3);

    int result2 = calculator(subtract, 5, 3);

    printf("Result 1: %d\n", result1);

    printf("Result 2: %d\n", result2);

    return 0;

}

In this example, the calculator function takes a function pointer as an argument and invokes it with two integer arguments. This allows for dynamic function dispatching and flexibility in the operations performed.