摘要：
#include <iostream>using namespace std;class software{public: software(){} virtual ~software(){} virtual void exec()=0;};class game : public software{public: game(){} virtual ~game(){} void exec(){cout<<"play game"<<endl;}};class office : public software{public: office(){ 阅读全文
摘要：
#include <iostream>using namespace std;class USA_bolt{public: USA_bolt(){} ~USA_bolt(){} void insert(){cout<<"insert"<<endl;}};class target{public: target(){} virtual ~target(){} virtual void charu()=0;};class China_outlet_adapter : public target{public: China_outlet_adap 阅读全文