#include <iostream>
using namespace std;

/*
	Date(Date& b)//拷贝构造
	{
		_year = b._year;
		_month = b._month;
		_day = b._day;
		cout << "Date(Date& b)" << endl;
	}
	Date& operator=(Date b)
	{
		_year = b._year;
		_month = b._month;
		_day = b._day;
		return b;
	}
	void Printf()
	{
		cout << _year << "-" << _month << "-" << _day << endl;
	}
private:
	int _year;
	int _month;
	int _day;
};
int main()
{
	Date a(2024, 4, 1);
	Date b;
	Date c;
	c = b = a;
	c.Printf();

	//b = a;
	return 0;
}*/
/*class Date
{
public:
	Date(int year = 1, int month = 1, int day = 1)//默认构造函数
	{
		_year = year;
		_month = month;
		_day = day;
		cout << "Date()" << endl;
	}
	Date(Date& b)//拷贝构造
	{
		_year = b._year;
		_month = b._month;
		_day = b._day;
		cout << "Date(Date& b)" << endl;
	}
	void operator=(Date b)//赋值重载
	{
		_year = b._year;
		_month = b._month;
		_day = b._day;
	}
	void Printf()
	{
		cout << _year << "-" << _month << "-" << _day << endl;
	}
private:
	int _year;
	int _month;
	int _day;
};

Date func()
{
	Date b(2024, 4, 1);//引用返回
	return b;
}


int main()
{
	const Date& a = func();
	return 0;
}*/

class A
{
public:
	A(int a1 = 1)//构造函数
	{
		_a1 = a1;
	}
	int operator+(A b)
	{
		return b._a1 + _a1;
	}
	void Printf()
	{
		cout << _a1 << endl;
	}
private:
	int _a1;

};
void Text()
{
	A a(2);
	a.Printf();
}
int main()
{
	Text();
	return 0;
}