设计模式之原型模式(prototype)

原理：拷贝自身对象实际上就是调用的拷贝构造函数，注意事项是这里的拷贝是深拷贝，即需要拷贝指针所指的内容

#include <stdio.h>
#include <memory>
#include <iostream>
 
class Resume
{
public:
	virtual Resume* Clone(){return NULL;}
	virtual ~Resume(){}
protected:
	char *name;
};
 
class ResumeA:public Resume
{
public:
	 ResumeA(const char* str);
	 Resume* Clone();
	 ResumeA(const ResumeA& r);
	 ~ResumeA();
};
 
ResumeA::ResumeA(const char* str)
{
	if (str == NULL)
	{
		name= new char[1];
		name[0] = '\0';
	}
	else
	{
		int length = strlen(str);
		name = new char[length + 1];
		strcpy(name,str);
		name[length] = '\0';
	}
}
 
ResumeA::ResumeA(const ResumeA& r)
{
	int length = strlen(r.name);
	name = new char[length + 1];
	strcpy(name,r.name);
 
}
Resume* ResumeA::Clone()
{
	return new Resume(*this);
}
 
int main()
{
	Resume* pObja= new ResumeA("abc");
	Resume* pCloneObja= pObja->Clone();
	delete pObja;
	delete pCloneObja;
	return 0;
}