2012年 上半年 第十二周 C++程序设计 （三十六）

#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
};

void vehicle::start()
{
status = running;
currentSpeed = 1;
}
void vehicle::stop()
{
if(currentSpeed < 5)
{
status = rest;
currentSpeed = 0;
}
else
{
cout<<"当前速度大于5，请减速，当前速度小于5时，才允许停车"<<endl;
}
}
void vehicle::speed_up()
{
if(currentSpeed<=90)
{
currentSpeed = currentSpeed + 1;
}
}
void vehicle::slow_down()
{
if(currentSpeed>0)
{
currentSpeed = currentSpeed - 1;
}
else if(currentSpeed == 0)
{
status = rest;
}
}

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<<"车正在行驶中，请停下后再上下车"<<endl;
}
else
{
if(passengerNum + p <= 0)
{
cout<<"车上没有司机"<<endl;
passengerNum = 1;
currentSpeed = 0;
status = rest;
}
else if(passengerNum + p >=seatNum )
{
cout<<"超员"<<endl;
passengerNum = seatNum;
}
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;
}