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(*fp1)(int,int) = add;
    int(*fp2)(int,int) = sub;
    int(*fp3)(int,int) = mul;
    int(*fp4)(int,int) = divide;
    int arr[4] ={fp1(a,b),fp2(a,b),fp3(a,b),fp4(a,b)};
    int result = arr[cmd];
    return result;
}

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