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) {
    int (*pointer_function_math[4]) (int, int);
    pointer_function_math[0] = add;
    pointer_function_math[1] = sub;
    pointer_function_math[2] = mul;
    pointer_function_math[3] = divide;
 
    return pointer_function_math[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