// Program to create class to represent time in hh:mm:ss format.
// Assignment-15
// timhms.cpp, Author - Krishna Kumar Khatri.

// Uncomment ONLY the following line if you are using Turbo/Borland compiler.
// #define TC
#ifdef TC
	#include <iostream.h>
#else
	#include <iostream>
	using namespace std;
#endif
#include <conio.h>  // For getch.

class Time
{
        int hh, mm, ss;
    public:
        Time(int h = 0, int m = 0, int s = 0) :
             hh(h), mm(m), ss(s)
            { }
        void display();
        void add(const Time&, const Time&);
};

void Time::display()
{
    hh < 10 ? cout << "0" << hh : cout << hh;
    cout << ":";
    mm < 10 ? cout << "0" << mm : cout << mm;
    cout << ":";
    ss < 10 ? cout << "0" << ss : cout << ss;
}

void Time::add(const Time& t1, const Time& t2)
{
    (t1.hh + t2.hh > 12) ? 
        hh = t1.hh + t2.hh - 12 :
        hh = t1.hh + t2.hh;
    
    if (t1.mm + t2.mm > 60) {
        hh++;
        mm = t1.mm + t2.mm - 60;
    } else
        mm = t1.mm + t2.mm;
    
    if (t1.ss + t2.ss > 60) {
        mm++;
        ss = t1.ss + t2.ss - 60;
    } else
        ss = t1.ss + t2.ss;
}

int main()
{
    #ifdef TC
        clrscr();
    #endif
    Time tm1(3, 42, 38);
    Time tm2(5, 32, 31);
    Time tm3;

    cout << "First time - ";
    tm1.display();
    cout << endl << "Second time - ";
    tm2.display();
    
    tm3.add(tm1, tm2);
    cout << endl << "Summed up - ";
    tm3.display();

    cout << endl << endl << "Program over. Press any key to exit...";
    getch();
    return 0; // Successful termination.
}