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; }

typedef int (*cmd_func_type) (int, int);

cmd_func_type cmd_arr[4] = {
    add, 
    sub, 
    mul, 
    divide
};
int execute_command(int a, int b, int cmd) {
    
    return cmd_arr[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