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");
}

void (* handler[])() = {on_button, on_timer, on_uart, on_power, on_error};

// Write your event dispatcher logic here
void handle_event(int event_code) {
    // Your logic
    if ((event_code >=0 ) && (event_code <= 4))
        handler[event_code]();
    else 
        printf("Unhandled Event");
  
}

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

Solving Approach

create array of the event handler functions. test the event code. if recognized code then invoke the appropriate handler. else print the unhandled event message