第11周项目2摩托车继承自行车和机动车

来源：互联网发布：印度山地师知乎编辑：程序博客网时间：2024/05/17 02:21

编号及代码：/**Copyright(c)2015,烟台大学计算机与工程学院*All rights reserved;*文件名称：score.cpp*作者：范星月*完成日期：2015年5月25日*版本号：v1.0**问题描述：摩托车继承自行车和机动车，自行车和机动车继承车*问题输入：*问题输出：*/#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{protected:    int maxSpeed;    int currentSpeed;    int weight;    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，当前速度为0切处在停车状态    void start();//由Rest状态到Running，初速度为1    void stop();//由Running状态到Rest状态，当前速度小雨5时，才允许停车    void speed_up();//加速，调用一次，速度加1    void slow_down();};vehicle::vehicle(int maxS,int w):maxSpeed(maxS),currentSpeed(0),weight(w),status(rest) {}void vehicle::start(){    if(status==rest)    {        status=running;        currentSpeed=1;    }    else        cout<<"车已经启动"<<endl;}void vehicle::stop(){    if(status==running)    {        if(currentSpeed<5)        {            status=rest;            currentSpeed=0;        }        else            cout<<"车速太快，请不要立即刹车"<<endl;    }    else        cout<<"车辆未开启"<<endl;}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;}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;public:    bicycle(int maxS=10,int w=50,int h=0.7);};bicycle::bicycle(int maxS,int w,int h):vehicle(maxS,w),height(h) {}class motorcar:virtual public vehicle{protected:    int seatNum;    int passengerNum;public:    motorcar(int maxS=150,int w=1500,int s=5,int p=1);    void addPassenger(int p=1);};motorcar::motorcar(int maxS,int w,int s,int p):vehicle(maxS,w),seatNum(s),passengerNum(p) {}void motorcar::addPassenger(int p){    if(status==running)        cout<<"请停车后再上车"<<endl;    else    {        passengerNum+=p;        if(passengerNum>seatNum)        {            passengerNum=seatNum;            cout<<"请不要超载,司机已经清理人员"<<endl;        }        else if(passengerNum<1)        {            passengerNum=1;            cout<<"司机，请不要走"<<endl;        }    }}class motorcycle:virtual public bicycle,virtual public motorcar{public:    motorcycle(int maxS=90,int w=100,int s=3,int p=1,int h=0.7);    void show();};motorcycle::motorcycle(int maxS,int w,int s,int p,int h):vehicle(maxS,w),bicycle(maxS,w,h),motorcar(maxS,w,s,p) {}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()返回键盘上的读取的字符        switch(keydown)        {        case '1':            cout<<"选中的操作时1-启动"<<endl;            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;}

学习总结：

class vehicle{}；//车类

class bicycle:virtual public vehicle//车类是自行车类的虚基类

class motorcar:virtual public vehicle/车类是/机动车类的虚基类

class motorcycle:virtual public bicycle,virtual public motorcar//摩托车继承自行车类和机动车类，虚基类避免了二义性

构造函数：

vehicle::vehicle(int maxS,int w):maxSpeed(maxS),currentSpeed(0),weight(w),status(rest) {}

bicycle::bicycle(int maxS,int w,int h):vehicle(maxS,w),height(h) {}

motorcar::motorcar(int maxS,int w,int s,int p):vehicle(maxS,w),seatNum(s),passengerNum(p) {}

motorcycle::motorcycle(int maxS,int w,int s,int p,int h):vehicle(maxS,w),bicycle(maxS,w,h),motorcar(maxS,w,s,p) {}

最后的派生类不仅要写出直接派生类的构造函数，也要写出简介派生类的构造函数

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