#include <iostream>
#include <memory>
class MyTime
{
int hours;
int minutes;
public:
MyTime() : hours(0), minutes(0)
{
std::cout << "Constructor MyTime()" << std::endl;
}
MyTime(int m) : hours(0), minutes(m)
{
std::cout << "Constructor MyTime(int)" << std::endl;
this->hours += this->minutes / 60;
this->minutes %= 60;
}
MyTime(int h, int m) : hours(h), minutes(m)
{
std::cout << "Constructor MyTime(int,int)" << std::endl;
this->hours += this->minutes / 60;
this->minutes %= 60;
}
~MyTime()
{
std::cout << "Destructor MyTime(). Bye!" << std::endl;
}
MyTime operator+(int m) const
{
MyTime sum;
sum.minutes = this->minutes + m;
sum.hours = this->hours;
sum.hours += sum.minutes / 60;
sum.minutes %= 60;
return sum;
}
friend std::ostream &operator<<(std::ostream &os, const MyTime &t)
{
std::string str = std::to_string(t.hours) + " hours and " + std::to_string(t.minutes) + " minutes.";
os << str;
return os;
}
};
int main()
{
// std::shared_ptr<MyTime> mt0 = new MyTime(0,70); //error
// MyTime * mt1 = std::make_shared<MyTime>(1, 70); //error
// {
// std::shared_ptr<MyTime> mt1(new MyTime(10));
// std::cout << *mt1 << std::endl;
// }
{
std::shared_ptr<MyTime> mt1 = std::make_shared<MyTime>(1, 70);
std::shared_ptr<MyTime> mt2 = mt1;
std::shared_ptr<MyTime> mt3 = mt2;
std::cout << "mt1: " << *mt1 << std::endl;
std::cout << "mt2: " << *mt2 << std::endl;
std::cout << "mt3: " << *mt3 << std::endl;
std::cout << "use_count() = " << mt2.use_count() << std::endl;
{
auto mt4 = mt3;
*mt4 = *mt4 + 50;
std::cout << "use_count() = " << mt3.use_count() << std::endl;
}
std::cout << "mt3: " << *mt3 << std::endl;
std::cout << "use_count() = " << mt3.use_count() << std::endl;
}
return 0;
}