cpp_introduction/Cpp_Introduction/Exercises/Time/Time.h at master · pelocpp/cpp_introduction · GitHub

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// ===========================================================================
// Time.h
// ===========================================================================

#pragma once

#include <iostream>

class Time
{
private:
    int m_seconds;
    int m_minutes;
    int m_hours;

public:
    // c'tors
    Time();
    Time(int seconds, int minutes, int hours);
    Time(int seconds);  // conversion c'tor
    Time(const char*);  // conversion c'tor

    // getter // setter
    int getSeconds() const { return m_seconds; }
    int getMinutes() const { return m_minutes; }
    int getHours() const { return m_hours; }
    void setSeconds(int seconds);
    void setMinutes(int minutes);
    void setHours(int hours);

    // public interface
    void reset();
    void add(const Time&);
    void sub(const Time&);
    Time diff(const Time&) const;
    void increment();
    void decrement();

    // arithmetic operators
    Time operator+ (const Time&) const;
    Time operator- (const Time&) const;

    // arithmetic-assignment operators
    Time operator+= (const Time&);
    Time operator-= (const Time&);
    Time operator+= (int seconds);
    Time operator-= (int seconds);

    // increment/decrement operators (prefix/postfix version)
    friend Time & operator++ (Time&);           // prefix increment
    friend const Time operator++ (Time&, int);  // postfix increment
    friend Time & operator-- (Time&);           // prefix decrement
    friend const Time operator-- (Time&, int);  // postfix decrement

    // comparison operators
    friend bool operator== (const Time&, const Time&);
    friend bool operator!= (const Time&, const Time&);
    friend bool operator<= (const Time&, const Time&);
    friend bool operator<  (const Time&, const Time&);
    friend bool operator>= (const Time&, const Time&);
    friend bool operator>  (const Time&, const Time&);

    // conversion operator
    operator int();

    // input / output
    friend std::ostream & operator<< (std::ostream&, const Time&);
    friend std::istream & operator>> (std::istream&, Time&);

private:
    // helper methods
    int timeToSeconds();
    void secondsToTime(int seconds);
};

// ===========================================================================
// End-of-File
// ===========================================================================