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 arr[4]={};
    arr[0]=add(a,b);
    arr[1]=sub(a,b);
    arr[2]=mul(a,b);
    arr[3]=divide(a,b);
    int *ptr=arr;
    *ptr = *(ptr+cmd);
    return *ptr;
}

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