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) {
    // Your logic here using function pointer array
    // Declare a function pointer
    int (* fa)(int,int) = add;
    int (* fs)(int,int) = sub;
    int (* fm)(int,int) = mul;
    int (* fd)(int,int) = divide;

    int result;
    if(cmd == 0)
        result = fa(a,b);
    else if(cmd == 1)
        result = fs(a,b);
    else if(cmd == 2)
        result = fm(a,b);
    else if(cmd == 3)
        result = fd(a,b);

    return result;
}

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