#include<iostream>
using std::cout;
using std::endl;

//抽象クラスvehicleの定義
class vehicle{
public:
   virtual void start(void)=0;
   virtual void stop(void)=0;
};

//vehicleを継承したクラスcarの定義
class car: public vehicle{
public:
   void start(void){
      cout << "car start" << endl;
   }
   void stop(void){
      cout << "car stop." << endl;
   }
};

//vehicleを継承したクラスmotorcycleの定義
class motorcycle: public vehicle{
public:
   void start(void){
      cout << "motorcycle start" << endl;
   }
   void stop(void){
      cout << "motorcycle stop." << endl;
   }
};

//テスト部
int main(void){
   vehicle* mycar;
   mycar = new car();
   (*mycar).start();
   (*mycar).stop();
   return 0;
}