建造者模式（C++）

#include <iostream>using namespace std;class buildcomputer{public:    buildcomputer(){}    virtual ~buildcomputer(){}    virtual void buildmouse()=0;    virtual void buildmointor()=0;    virtual void buildkeyboard()=0;    virtual void buildhost()=0;};class winbuildcomputer : public buildcomputer{public:    winbuildcomputer(){}    virtual ~winbuildcomputer(){}    void buildmouse(){cout<<"build win mouse"<<endl;}    void buildmointor(){cout<<"build win mointor"<<endl;}    void buildkeyboard(){cout<<"build win keyboard"<<endl;}    void buildhost(){cout<<"build win host"<<endl;}};class macbuildcomputer : public buildcomputer{public:    macbuildcomputer(){}    virtual ~macbuildcomputer(){}    void buildmouse(){cout<<"build mac mouse"<<endl;}    void buildmointor(){cout<<"build mac mointor"<<endl;}    void buildkeyboard(){cout<<"build mac keyboard"<<endl;}    void buildhost(){cout<<"build mac host"<<endl;}};class director{private:    buildcomputer *instance;public:    director(buildcomputer *bd)        :instance(bd){}    virtual ~director(){}    void creator()    {        instance->buildmouse();        instance->buildmointor();        instance->buildkeyboard();        instance->buildhost();    }};int main(){    buildcomputer *p=new macbuildcomputer;    director *dc=new director(p);    dc->creator();    delete dc;    delete p;    p=new winbuildcomputer;    dc=new director(p);                dc->creator();    delete dc;    delete p;    system("pause");    return 0;}