// Time class
// Version 1.3
//
// New in this version: get/set methods.

#include <iostream>
using std::cout;
using std::cin;
using std::istream;
using std::ostream;

class Time
{
public:
    Time() : Time(99, 99) {}
    Time(int h) : Time(h, 0) {}
    Time(int h, int m) : hours_(h), minutes_(m) {}

    void read(istream & in);
    void print(ostream & out) const;
    double minus(const Time & t2) const;

    int hours() const { return hours_; }
    int minutes() const { return minutes_; }

    void set_hours(int new_hours) { hours_ = new_hours; }
    void set_minutes(int new_minutes) { minutes_ = new_minutes; }

    void set(int new_hours, int new_minutes = 0);

private:
    int hours_;
    int minutes_;
};

inline void Time::read(istream & in) {
    in >> hours_;
    in.get(); // colon
    in >> minutes_;
}

inline void Time::print(ostream & out) const {
    out << hours_ << ':';
    if ( minutes_ < 10 ) out << '0';
    out << minutes_;
}

inline double Time::minus(const Time & t2) const
{
    return (hours_ + minutes_/60.0) -
        (t2.hours_ + t2.minutes_/60.0);
}

inline void Time::set(int new_hours, int new_minutes)
{
    hours_ = new_hours;
    minutes_ = new_minutes;
}

void println(const Time & t, ostream & out)
{
    t.print(out);
    out << '\n';
}

void print_with_h(const Time & t, ostream & out)
{
    out << t.hours() << 'h';
    if (t.minutes() < 10) out << '0';
    out << t.minutes();
}

int main()
{
    Time t(12,41);
    print_with_h(t, cout);
    cout << '\n';

//    t = Time(t.hours(), 45);
    t.set_minutes(45);
    println(t, cout);

    t.set_hours(13);
    println(t, cout);

    t.set(11,30);
    println(t, cout);

    t.set(12);
    println(t, cout);

    return 0;
}