新建 文本文档.txt

来自「用什么语言能编制出好的程序」· 文本 代码 · 共 30 行

#include<iostream.h>
class TA
{
public:
	TA(){cout<<"construction the class TA"<<endl;}
	~TA(){cout<<"destruction the class TA"<<endl;}
	 void f(){cout<<"You are the best boy"<<endl;}
};
class TsmartA
{
public:
	TsmartA (TA* pt):ptr (pt){cout<<"construction the class TsmartA"<<endl;}
	~TsmartA()
	{
		cout<<"destruction the class TsmartA"<<endl;
		delete ptr;
	}
	TA* operator->() {return ptr;}
	operator bool(){return ptr;}
private:
	TA* ptr;
};
int main()
{
	TsmartA sa(new TA);
//	sa->f();   //在这里相当于sa.operator->())->f()
    if(sa)
		sa->f();
	return 1;
}