2012C++程序设计实验报告【12.3】

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* (程序头部注释开始)
* 程序的版权和版本声明部分
* Copyright (c) 2011, 烟台大学计算机学院学生
* All rights reserved.
* 文件名称:                
* 作    者:      王琳                      
* 完成日期:    2012     年   5    月   9 日
* 版 本 号:     12-3

* 对任务及求解方法的描述部分
* 问题描述:在一段类的定义中,自行车类的虚基类为车辆类,机动车类的虚基类也为车辆类,摩托车类的基类为自行车类和机动车类,类之间均为公有继承。
(1)根据上面各类间关系的描述,补全下面程序段中空缺的代码
(2)实现程序中声明的成员函数,注意相应操作中的动作发生的条件不能满足时应给出提示。
(3)运行程序,享受开摩托的过程

* 程序头部的注释结束
*/

源程序:

#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) : maxSpeed(maxS), weight(w), currentSpeed(0), status(rest){} //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};void vehicle :: start()  //由rest状态到running, 初速为1{status = running;currentSpeed = 1;}void vehicle :: stop() //由running状态到rest, 当前速度小于5时,才允许停车{if(currentSpeed > 5)cout << "车速太快!先减速再停车……";else{currentSpeed = 0;status = rest;}}void vehicle :: speed_up()  //加速,调用1次,速度加1{if(currentSpeed == 0){cout << "车辆未启动!" << endl;}else if(currentSpeed >= maxSpeed){cout << "请不要超速行驶……" << endl;}else{currentSpeed += 1;}}void vehicle :: slow_down() //减速,调用1次,速度减1,速度为0时,停车{if(currentSpeed - 1 == 0){currentSpeed = 0;status = rest;}else if(currentSpeed - 1 < 0){cout << "车辆未启动!" << endl;currentSpeed = 0;status = rest;}else{currentSpeed -= 1;}}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) : vehicle(maxS, w), height(h){}   //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) : vehicle(maxS, w), passengerNum(p),seatNum(s){}   //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……};void motorcar :: addPassenger(int 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……{if(currentSpeed != 0)cout << "车辆正在行驶,停车后再上下车!" << endl;else{if(passengerNum + p > seatNum){cout << "涉嫌超员,已清理后达到满员!" << endl;passengerNum = seatNum;}else if(passengerNum + p <= 0){cout << "请司机不要离开岗位!" << endl;passengerNum = 1;currentSpeed = 0;status = rest;}else{passengerNum = passengerNum + p;}}}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) : vehicle(maxS, w), bicycle(maxS, w, h), motorcar(maxS, w, s, p){}   //定义构造函数void show(); //显示摩托车的运行状态};void motorcycle :: show() //显示摩托车的运行状态{cout << "状态:" ;if(status)cout << "行进";else cout << "泊车";cout << "         " << "车速:" << currentSpeed << "/" << maxSpeed << "         " << "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<<"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;}


 

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