修饰器

        修饰器模式在java中很普遍(I/O操作的类)，下面是我在C++中的实现
        #ifndef BASECLASS_H
#define BASECLASS_H
#include <iostream>
using namespace std;

class baseClass
{
public:
    baseClass();
    virtual ~baseClass()=0;
    virtual void function()=0;


};

#endif // BASECLASS_H

#include "baseclass.h"

baseClass::baseClass()
{
}
baseClass::~baseClass()
{
    cout<<"baseClass";
}

#ifndef SUBCLASS_1_H
#define SUBCLASS_1_H
#include "baseclass.h"
#include <iostream>
using namespace std;

class subClass_1 : public baseClass
{
public:
    subClass_1();
    ~subClass_1();
    void function();
};

#endif // SUBCLASS_1_H

#include "subclass_1.h"

subClass_1::subClass_1()
{
}
subClass_1::~subClass_1()
{
    cout<<"subClass_1";
}
void subClass_1::function()
{
    cout<<"subClass_1_2_3";
}

#ifndef DECORATORCLASS_H
#define DECORATORCLASS_H
#include "baseclass.h"

class DecoratorClass
{
public:
    DecoratorClass(baseClass *bc);
    ~DecoratorClass(){delete _bc;}
    void function(){_bc->function();}
private:
    baseClass *_bc;
};

#endif // DECORATORCLASS_H

#include "decoratorclass.h"

DecoratorClass::DecoratorClass(baseClass *bc):_bc(bc)
{
}
#include <iostream>
#include "decoratorclass.h"
#include "subclass_1.h"


using namespace std;
#include "test.h"

int main()
{

    DecoratorClass dc(new subClass_1);
    dc.function();
    return 0;
}