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 (*myfun) (int a, int b);
    if(cmd==0)
    {
        myfun = add;
    }
    if(cmd==1)
    {
        myfun = sub;
    }
    if(cmd==2)
    {
        myfun = mul;
    }
    if(cmd==3)
    {
        myfun = divide;
    }
    return myfun(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