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