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 struct {
    int (*state_function)(int a, int b);
}operation_t;

operation_t math_handler[] {
    {add},
    {sub},
    {mul},
    {divide}
};

int execute_command(int a, int b, int cmd) {
    return math_handler[cmd].state_function(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