第十二周任务（2）

#include <iostream>#include<conio.h>#include <windows.h>using namespace std;enum vehicleStaus {rest, running};  //车辆状态：泊车、行进class vehicle //车辆类{protected:int maxSpeed;//最大车速int currentSpeed;//当前速度int weight;//车重vehicleStaus status; //rest-泊车状态；running-行进状态public:vehicle(int maxS, int w); //构造函数，初始时，当前速度总为0且处在停车状态void start();  //由rest状态到running, 初速为1void stop(); //由running状态到rest, 当前速度小于5时，才允许停车void speed_up();  //加速，调用1次，速度加1void slow_down(); //减速，调用1次，速度减1，速度为0时，停车};class bicycle :virtual public vehicle//（1）自行车类的虚基类为车辆类{ protected:double height; //车高public:bicycle(int maxS=10, int w=50, int h=0.7);   //定义构造函数};class motorcar :virtual public vehicle//（2）机动车类的虚基类也为车辆类{ protected:int seatNum; //座位数int passengerNum; //乘客人数public:motorcar(int maxS=150, int w=1500, int s=5, int p=1);   //定义构造函数void addPassenger(int p=1);   //搭载乘客，超员要拒载，有人下车时，p为负数。当然车上乘客至少有1个（司机）。上下车时要保证安全……};class motorcycle: public bicycle,public motorcar//（3）摩托车类的基类为自行车类和机动车类{ {public:motorcycle(int maxS=90, int w=100, int s=3, int p=1, int h=0.7);   //定义构造函数void show(); //显示摩托车的运行状态};void vehicle::start(){currentSpeed=1;}void vehicle::stop(){if(currentSpeed<5)currentSpeed=0;     status=rest;}void vehicle::speed_up(){currentSpeed++;}void vehicle::slow_down(){currentSpeed--;}void motorcar::addPassenger(int p)     {  if((p+passengerNum)>seatNum)  cout<<"即将超员，请您配合，不要上车，等下一班车...";  passengerNum+=p;  }  int main( ){motorcycle m;bool end=false;while (!end){cout<<"请操作：1-启动  2-加速  3-减速  4-有人上车  5-有人下车  6-停车 0-结束"<<endl;char keydown= _getch(); //_getch()返回键盘上读取的字符,应包含头文件<conio.h>switch(keydown){case '1': cout<<"操作(启动)\t"; m.start(); break;case '2':                         cout<<"操作(加速)\t"; m.speed_up(); break;case '3':                          cout<<"操作(减速)\t"; m.slow_down(); break;case '4':                        cout<<"操作(有人上车)\t"; m.addPassenger(); break;case '5':                      cout<<"操作(有人下车)\t"; m.addPassenger(-1); break;case '6':                      cout<<"操作(停车)\t"; m.stop(); break;case '0':               end=true; break;}m.show();cout<<endl;Sleep(200);  //要包含头文件<windows.h>}system("pause");return 0;}