4.cpp

一、教学目的： 能理解C++中运算符重载的需要性

#include<iostream.h>          
#include<string>

class Person
{
public:
      Person(char*pN);
      Person(Person&p);
	  ~Person();
protected:
	char* pName;
};
Person::Person(char*pN)
{
	  cout<<"Constructing "<<pN<<endl;
	  pName=new char[strlen(pN)+1];
	  if(pName!=0)
	  {
		  strcpy(pName,pN);
	  }
}
Person::Person(Person& p)
{
	cout<<"Copying "<<p.pName<<" into its own block\n";
	pName=new char[strlen(p.pName)+1];
	if(pName!=0)
		strcpy(pName,p.pName);
}
Person::~Person()
 {
	  cout<<"Destructing "<<pName<<endl;
	  pName[0]='\0';
	  delete pName;
 }

void main()
{
	Person p1("Randy");
	Person p2=p1;//即Person p2(p1);
}