Event-Based Triggers Using Function Pointer Array

Code

#include <stdio.h>

void on_button() {
    printf("Button Pressed");
}
void on_timer() {
    printf("Timer Expired");
}
void on_uart() {
    printf("UART Received");
}
void on_power() {
    printf("Power On");
}
void on_error() {
    printf("Error Detected");
}

// Write your event dispatcher logic here
void handle_event(int event_code) {
    // Your logic
    void (*func_arr[5])(void) = {on_button, on_timer, on_uart, on_power, on_error};
    if (0 > event_code || 4 < event_code) {
        printf("Unhandled Event");
    }
    else {
        func_arr[event_code]();
    }
}

int main() {
    int event;
    scanf("%d", &event);
    handle_event(event);
    return 0;
}

Solving Approach

You can write code like below

typedef void (*EventFunc)();

void handle_event(int code) {
    EventFunc table[] = { on_button, on_timer, on_uart, on_power, on_error };

    if (code >= 0 && code < 5)
        table[code]();
    else
        printf("Unhandled Event");
}