Function Pointer Dispatch Table

Code

#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 (*addp)(int, int) = add;
    int (*subp)(int, int) = sub;
    int (*mulp)(int, int) = mul;
    int (*dividep)(int, int) = divide;
    int arr [4] ={addp(a,b),subp(a,b),mulp(a,b),dividep(a,b)};

    return arr[cmd];
}

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