Design Pattern Prototype 原型设计模式

#include <string>
#include <iostream>
using namespace std;

class MultiData
{
protected:
	bool b;
	char c;
	string s;
	int a;
public:
	virtual MultiData *clone() = 0;
	virtual void show() = 0;
	virtual void setData(bool b1, char c1, string s1, int a1) = 0;
};

class CloneData:public MultiData
{
public:
	void setData(bool b1, char c1, string s1, int a1)
	{
		b1 = b, c = c1, s = s1, a = a1;
	}

	MultiData *clone()
	{
		MultiData *md = new CloneData;
		*md = *this;
		return md;
	}
	void show()
	{
		cout<<a<<' '<<b<<' '<<c<<' '<<s<<endl;
	}
};

int main()
{
	MultiData *cd = new CloneData;
	cd->setData(true, 'c', "Hello, world", 1002);

	MultiData *cd2 = cd->clone();

	cd->show();
	cout<<"\nThe cloned object is:\n";
	cd2->show();

	delete cd;
	delete cd2;
	return 0;
}