Event-Based Triggers Using Function Pointer Array

Code

#include <stdio.h>

#define BUTTON_PRESS  0
#define TIMER_EXPIRE  1
#define UART_RECEIVED 2
#define POWER_ON      3
#define ERR_DETECTED  4

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");
}

void handle_event(int event_code) {
    void (*events[])(void) {
        on_button,
        on_timer,
        on_uart,
        on_power,
        on_error
    };

    if (event_code >= BUTTON_PRESS && event_code <= ERR_DETECTED)
        events[event_code]();
    else {
        printf("Unhandled Event\n");
    }
}

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

Solving Approach