pr09004.cpp

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////////////////////////////////////////
// File Name: pr09004.cpp
////////////////////////////////////////
#include <iostream>
#include <iomanip>
#include <ctime>

// Date structure with a function.
struct Date
{
    int month, day, year;
    void display();    // A function to display the date.
};

////////////////////////////////////////
// Implementation of the Date
// structure's display() member
// function.
////////////////////////////////////////
void Date::display()
{
    static char *mon[] =
    {
        "January","February","March","April","May","June",
        "July","August","September","October","November",
        "December"
    };

    std::cout << mon[month] << ' ' << day << ", " << year;
}

// Time structure with a function.
struct Time {
    int hour, minute, second;
    void display();    // A function to display the time.
};

////////////////////////////////////////
// Implementation of the Time
// structure's display() member
// function.
////////////////////////////////////////
void Time::display()
{
    std::cout.fill('0');
    std::cout << (hour>12?hour-12:(hour==0?12:hour)) << ':'
              << std::setw(2) << minute << ':' 
              << std::setw(2) << second
              << (hour < 12 ? "am" : "pm");
}

////////////////////////////////////////
// The main() function.
////////////////////////////////////////
int main()
{
    // Get the current time from the OS.
    std::time_t curtime = time(0);
    std::tm tim = * std::localtime(&curtime);

    // Define Time and Date structures.
    Time now;
    Date today;

    // Initialize the structures.
    now.hour = tim.tm_hour;
    now.minute = tim.tm_min;
    now.second = tim.tm_sec;
    today.month = tim.tm_mon;
    today.day = tim.tm_mday;
    today.year = tim.tm_year+1900;

    // Display the current date and time.
    std::cout << "At the tone it will be ";
    now.display();
    std::cout << " on ";
    today.display();
    std::cout << '\a' << std::endl;

    return 0;
}