Question

C++问题,急求解答!!!

1. 先设计一个vehicle基类，包含Run()和Stop()等成员函数，由此vehicle基类派生出bicycle类和motocar类，并由这两个派生类继续派生出motocycle类，每个派生类中都有自己的与基类中功能不同的Run()和Stop()成员函数。
要求：
(1)在主函数中分别声明vehicle类、bicycle类、motocar类、motocycle类的对象，通过这些对象调用Run()和Stop()成员函数，要求每个对象能够调用对象所属派生类自己的成员函数。
(2)声明vehicle类的指针，让此对象指针依次指向vehicle类、bicycle类、motocar类、motocycle类的对象，并同时用该对象指针调用调用Run()成员函数。

Answer 1

public abstract class vechicle
{
public virtual float Run(folat distance)
{
return distance/speed;
}
public virtual void Stop(bool color)
{
if (color ==true) cout<<"stop";
}
}

public class bicycle:vehicle
{
public override folat Run(float distance)
{
写要求的代码
}

public override void Stop()
{
写要求的代码
}
public bicycle（）
{根据情况写构造函数}
}

public class motocar:vehicle
{
public override folat Run(float distance)
{
写要求的代码
}

public override void Stop()
{
写要求的代码
}
public motocar（）
{根据情况写构造函数}

}

public class motocycle :motocar,bicycle
{
public override folat Run(float distance)
{
写要求的代码
}

public override void Stop()
{
写要求的代码
}
public motocycle（）
{根据情况写构造函数}

}

void Main()
{
bicycle a;
motocar b;
motocycle c;
}

Answer 2

#include <iostream>
#include <string>
using namespace std;

class vehicle
{
public:
void Run();
void Stop();
};

void vehicle::Run()
{
cout<<"Run in vehicle"<<endl;
}

void vehicle::Stop()
{
cout<<"Stop in vehicle"<<endl;
}

//------------------------

class bicycle : public vehicle
{
public:
void Run();
void Stop();
};

void bicycle::Run()
{
cout<<"Run in bicycle"<<endl;
}

void bicycle::Stop()
{
cout<<"Stop in bicycle"<<endl;
}

//-------------------------

class motocar : public vehicle
{
public:
void Run();
void Stop();
};

void motocar::Run()
{
cout<<"Run in motocar"<<endl;
}

void motocar::Stop()
{
cout<<"Stop in motocar"<<endl;
}

//-------------------------

class motocycle : public motocar, public bicycle
{
public:
void Run();
void Stop();
};

void motocycle::Run()
{
cout<<"Run in motocycle"<<endl;
}

void motocycle::Stop()
{
cout<<"Stop in motocycle"<<endl;
}

//--------------------------

int main()
{
vehicle* pv = NULL;
vehicle oVehicle;
bicycle oBicycle;
motocar oMotocar;
motocycle oMotocycle;

oVehicle.Run();
oBicycle.Run();
oMotocar.Run();
oMotocycle.Run();

pv = &oVehicle;
pv->Run();

pv = &oBicycle;
pv->Run();

pv = &oMotocar;
pv->Run();

pv = (vehicle*)(motocar*)(&oMotocycle);
pv->Run();

system("pause");

}