56. Function Pointer Dispatch Table

#include <stdio.h>

int add(int a, int b) { return a + b; }
int sub(int a, int b) { return a - b; }
int mul(int a, int b) { return a * b; }
int divide(int a, int b) { return a / b; }

int execute_command(int a, int b, int cmd) {
    // Your logic here using function pointer array
    //Create function array pointer
    int (*function_ptr_arr[4])(int,int);
    //Assign functions to function array
    function_ptr_arr[0] = add;
    function_ptr_arr[1] = sub;
    function_ptr_arr[2] = mul;
    function_ptr_arr[3] = divide;
    //METHOD 2:
    //int (*operations[4])(int, int) = { add, sub, mul, divide };

    //Return function pointer that points to corresponding function
    return function_ptr_arr[cmd](a,b);
}

int main() {
    int a, b, cmd;
    scanf("%d %d %d", &a, &b, &cmd);

    int result = execute_command(a, b, cmd);
    printf("%d", result);

    return 0;
}

Solving Approach