[C++知识库]C++构造函数和析构函数

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#include<iostream>
#include<string>
using namespace std;
class book
{
public:
	book() {
		cout << "用来构造无参的对象" << endl;
	}
	book(string name, int num)
	{
		m_name = name;
		m_num = num;
	}
	book(string name)
	{
		m_name = name;
		m_num = 204;
	}
	void print()
	{
		cout << m_name << "\t" << m_num << endl;
	}
protected:
	string m_name;
	int m_num;
private:

};
int main()
{
	book BOOK;//调用无参的构造函数
	book BO("三国", 201);//构造函数决定对象的长相
	BO.print();
	book* p = new book("水浒", 202);
	p->print();
	book BOO = { "红楼梦",203 };
	BOO.print();
	BOO = { "西游记"};
	BOO.print();
	return 0;
}