设计模式之- 外观模式（Facade Pattern）

#include<iostream>
using namespace std;


class Shape {
public:
   virtual void draw()=0;
};


class Rectangle : public Shape {
public:
    void draw() {
       cout<<"Rectangle::draw()"<<endl;
    }
};


class Square  : public Shape {
public:
    void draw() {
       cout<<"Square ::draw()"<<endl;
    }
};



class Circle   : public Shape {
public:
    void draw() {
       cout<<"Circle ::draw()"<<endl;
    }
};


class ShapeMaker {

    Shape *circle;
    Shape *rectangle;
    Shape *square;

public:
    ShapeMaker() {
        circle = new Circle();
        rectangle = new Rectangle();
        square = new Square();
    }
    void drawCircle(){
        circle->draw();
    }
    void drawRectangle(){
        rectangle->draw();
    }
    void drawSquare(){
        square->draw();
    }
};


class FacadePatternDemo {
public: 
    static void method(int argc,char**argv) {
        ShapeMaker *shapeMaker = new ShapeMaker();
        shapeMaker->drawCircle();
        shapeMaker->drawRectangle();
        shapeMaker->drawSquare();      
    }
};


int main(int argc,char**argv){
    FacadePatternDemo::method(argc,argv);
    return 0;
}