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声明一个Vehicle类，有数据成员MaxSpeed，Weight及成员函数Run、Stop实现输出其运动状态；并由Vehicle类派生出自行车（bicycle）类，增加数据成员高度（height）和操作函数SetMaxSpeed（ int n ）直接给MaxSpeed赋值。成员函数的实现均在类外实现。声明一个自行车类对象cBicycle，写出基类和派生类的构造函数和析构函数的调用顺序

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相关建议 2013-06-21

#pragma once

#include <iostream>

using namespace std;

class Vehicle

{

public:

Vehicle(void);

~Vehicle(void);

int MaxSpeed;

int Weight;

void Run();

void Stop();

};

#include "Vehicle.h"

Vehicle::Vehicle(void)

{

}

Vehicle::~Vehicle(void)

{

}

void Vehicle::Run()

{

cout<<"自行车正在以"<<MaxSpeed<<"的速度运动"<<endl;

}

void Vehicle::Stop()

{

cout<<"停止运动"<<endl;

}

//自行车类

#pragma once

#include "vehicle.h"

class bicycle :

public Vehicle

{

public:

bicycle(void);

~bicycle(void);

int height;

void SetMaxSpeed(int n);

};

#include "bicycle.h"

bicycle::bicycle(void)

{

}

bicycle::~bicycle(void)

{

}

void bicycle::SetMaxSpeed(int n)

{

MaxSpeed = n;

}

#include "bicycle.h"

bicycle cBicycle;

void main()

{

cBicycle.SetMaxSpeed(5);

cBicycle.Run();

cBicycle.Stop();

system("pause");

}

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其他看法

第1个回答 2013-06-21

class  Vehicle
{
public:
    Vehicle();
    ~Vehicle();
proctected:
    int MaxSpeed;
    int Weight;
    bool Run();
    bool Stop();
}

class  bicycle : public Vehicle
{
public:
    bicycle();
    ~bicycle();
proctected:
    int height;
    bool SetMaxSpeed(int );
}

bool bicycle::SetMaxSpeed(int speed)
{
    MaxSpeed = speed;
    return true;
}

int main()
{
    bicycle cBicycle;
    return 0;
}

顺序为：先父类构造，再子类构造；先子类析构，再父类析构

追问

运行不出来呀

追答

本来就不能运行，每个函数的功能你都没说，我函数都没写呢怎么运行？这个题目要可以运行的？

追问

对啊,要运行的,快快快

追答#include<iostream>
using namespace::std;
class  Vehicle
{
public:
    Vehicle();
    ~Vehicle();
protected:
    int MaxSpeed;
    int Weight;
    bool Run();
    bool Stop();
};

class  bicycle : public Vehicle
{
public:
    bicycle();
    ~bicycle();
protected:
    int height;
    bool SetMaxSpeed(int );
};

Vehicle::Vehicle()
{
Run();
}
Vehicle::~Vehicle()
{
Stop();
}
bool Vehicle::Run()
{
cout<<"vehicle running"<<endl;
return true;
}
bool Vehicle::Stop()
{
cout<<"vehicle stopped"<<endl;
return true;
}
bool bicycle::SetMaxSpeed(int speed)
{
    MaxSpeed = speed;
    return true;
}
bicycle::bicycle()
{
}
bicycle::~bicycle()
{
}

int main()
{
    bicycle cBicycle;
    return 0;
}

好了，交了吧

本回答被提问者采纳

第2个回答 2013-06-21

//C++ CODE

#include <iostream>

using namespace std;

class Vehicle {
public:
Vehicle () {
cout << "Vehicle construct" << endl;
}

virtual ~Vehicle () {
cout << "Vehicle deConstruct" << endl;
}

void Run () {}
void Stop () {}

protected:
    int    m_maxSpeed;
    int    m_weight;
};

class Bicycle : public Vehicle {
public:
Bicycle () {
cout << "Bicycle construct" << endl;
}
virtual ~Bicycle () {
cout << "Bicycle deConstruct" << endl;
}

void setMaxSpeed (int n);

private:
int m_height;
};

void Bicycle::setMaxSpeed (int n) {
m_maxSpeed = n;
}

int main (int argc, char** argv) {

#define HEAP
//--Way 1: in the stack
#ifndef HEAP
Bicycle bicyc();

//--Way 2: in the heap
#ifdef HEAP
Bicycle* bicyc = new Bicycle();
bicyc->setMaxSpeed(100);
delete bicyc;
bicyc = NULL;
#endif
return true;
}

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