#include <iostream>
#include <cstdlib>
#include <ctime>    //for the functions time and localtime
using namespace std;

int main()
{
        //Get the current hour of the day (0 to 23 inclusive).
        time_t t {time(nullptr)};
        tm *p {localtime(&t)};
        int hour {p->tm_hour};

	cout << "The current (24-hour) hour is " << hour << ".\n"
	     << "The current (12-hour) hour is " << hour % 12 << " ";

	if (hour < 12) {
		cout << "a.m.";
	} else {
		cout << "p.m.";
	}
	
	cout << "\n";

	if (hour < 12) {
		cout << "Good morning!\n";
	}
	else if (hour < 12 + 6) {
		cout << "Good afternoon!\n"; 
	}
	else {
		cout << "Good evening!\n";
	}
	cout << "\n";
        return EXIT_SUCCESS;
}