问题及代码:
#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1 void 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1 void slow_down(); //减速,调用1次,速度减1,速度为0时,停车 }; //构造函数,初始时,当前速度总为0且处在停车状态 Vehicle::Vehicle(int maxS, int w):maxSpeed(maxS), currentSpeed(0),weight(w), status(rest) {} //启动:由rest状态到running, 初速为1 void Vehicle::start() { if (status==rest) { status=running; currentSpeed=1; } else cout<<"车辆已经行驶!"<<endl; } //由running状态到rest, 当前速度小于5时,才允许停车 void Vehicle::stop() { if (status==running) if(currentSpeed<5) { status=rest; currentSpeed=0; } else cout<<"车速太快!先减速再停车……"<<endl; else cout<<"车辆未启动!"<<endl; } //加速,调用1次,速度加1 void Vehicle::speed_up() { if (status==running) if(currentSpeed<maxSpeed) ++currentSpeed; else cout<<"请不要超速行驶……"<<endl; else cout<<"车辆未启动!"<<endl; } //减速,调用1次,速度减1,速度为0时,停车 void Vehicle::slow_down() { if (status==running) { if(currentSpeed>0) --currentSpeed; } else cout<<"车辆未启动!"<<endl; if(currentSpeed==0) status=rest; } class Bicycle :virtual public Vehicle //()自行车类 { protected: double height; //车高 public: Bicycle(int maxS=10, int w=50, double h=0.7); //定义构造函数 }; Bicycle::Bicycle(int maxS, int w, double h):Vehicle(maxS, w),height(h) {} class Motorcar : virtual public Vehicle//()机动车类 { 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…… }; //定义构造函数 Motorcar::Motorcar(int maxS, int w, int s, int p): Vehicle(maxS, w),seatNum(s),passengerNum(p) {} //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…… void Motorcar::addPassenger(int p) { if (status==running) { cout<<"车辆正在行驶,停车后再上下车!"<<endl; } else { passengerNum+=p; if(passengerNum>seatNum) { passengerNum=seatNum; cout<<"涉嫌超员,已清理后达到满员!"<<endl; } else if (passengerNum<1) { passengerNum=1; cout<<"请司机不要离开岗位!"<<endl; } } } class Motorcycle: public Bicycle, public Motorcar //()摩托车类 { public: Motorcycle(int maxS=90, int w=100, int s=3, int p=1, double h=0.7); //定义构造函数 void show(); //显示摩托车的运行状态 }; //定义构造函数 Motorcycle::Motorcycle(int maxS, int w, int s, int p, double h):Vehicle(maxS, w),Bicycle(maxS, w, h),Motorcar(maxS, w, s, p) {} //显示摩托车的运行状态 void Motorcycle::show() { cout<<"状态:"; if(status==rest) cout<<"泊车;\t"; else cout<<"行进;\t"; cout<<"车速:"<<currentSpeed<<" / "<< maxSpeed <<"\t当前乘员:"<<passengerNum<<" / "<< seatNum << endl; } 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<<"选中的操作是1-启动\t"; m.start(); break; case '2': cout<<"选中的操作是2-加速\t"; m.speed_up(); break; case '3': cout<<"选中的操作是3-减速\t"; m.slow_down(); break; case '4': cout<<"选中的操作是4-有人上车\t"; m.addPassenger(); break; case '5': cout<<"选中的操作是5-有人下车\t"; m.addPassenger(-1); break; case '6': cout<<"选中的操作是6-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> } return 0; }
运行结果:
知识点总结:
对类的继承的进一步的使用,综合性的加强对于继承的理解。
时间: 2024-11-05 21:59:43