Problem E: 驾驶员与汽车

Problem E: 驾驶员与汽车

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 819  Solved: 369
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Description

我们知道，目前我国的驾照大致可分为A、B、C三种，其中C证只能开小型客车（货车），B证可开中、小型客车（货车），A证没有限制。现在请定义如下几个类：

1. Automobile：抽象类，具有数据成员double speed，纯虚函数virtual void run() const = 0。

2. 六种车型，即小型车Benz、Buick；中型车Zhongba、Beiqi；以及大型车Dayu、Jianghuai。它们都是Automobile的子类。

3. Driver类，具有string name和char type两个数据成员，前者是司机的名字，后者是司机持有的驾照类型（A、B或C）。提供Drive(Automobile *)方法，根据驾照类型判定该司机是否可以驾驶指定的汽车。

 

Input

输入分多行。第一行是一个整数M>0，表示之后有M个测试用例。

每个测试用例包括四部分：司机姓名（不含空白符）、驾照类型（A、B或C）、车型（分别用字母a~f表示六种车型，对应的车型可以从main()中看出）以及该车的行驶速度（double类型范围内的正数）。

 

Output

输出共M行，每个测试用例对应一行输入，具体格式参见样例。

 

Sample Input

4 zhangsan C a 100.33 lisi C d 100.33 wangwu B f 100.33 Tom A e 300.00

Sample Output

Driver zhangsan can drive Benz at speed of 100.33km/h. A Benz is erased! An automobile is erased! Driver lisi cannot drive bus. A Beiqi is erased! An automobile is erased! Driver wangwu cannot drive large bus. A Jianghuai is erased! An automobile is erased! Driver Tom can drive Dayu at speed of 300.00km/h. A Dayu is erased! An automobile is erased!

HINT

1.使用typeid来判定一个基类指针实际指向的对象的类型。

 

2.注意：append.cc中已经给出了Driver类的一个方法，不要在Driver类重复定义了。

 

 

Append Code

#include<iostream>#include<set>#include<iterator>#include<string>#include<set>#include <typeinfo>#include<queue>#include<list>#include<algorithm>#include<cstdio>#include<cctype>#include<cstring>#include<map>#include<vector>#include<cstdlib>#include<cmath>#include<stack>#include<sstream>#include<iomanip>using namespace std;class Automobile{protected:    double speed;public:    virtual void run() const = 0;   Automobile(double s=0):speed(s){}    virtual ~Automobile(){cout<<"An automobile is erased!"<<endl;}};class Benz:public Automobile{     protected:    double speed;public:    Benz(double s=0):speed(s){}    void run()const{cout<<setiosflags(ios::fixed)<<"Benz at speed of "<<setprecision(2)<<speed<<"km/h."<<endl;}    ~Benz(){cout<<"A Benz is erased!"<<endl;}};class Buick:public Automobile{    protected:    double speed;public:    Buick(double s):speed(s){}    void run()const{cout<<setiosflags(ios::fixed)<<"Buick at speed of "<<setprecision(2)<<speed<<"km/h."<<endl;}    ~Buick(){cout<<"A Buick is erased!"<<endl;}};class Zhongba:public Automobile{    protected:    double speed;public:    Zhongba(double s):speed(s){}    void run()const{cout<<setiosflags(ios::fixed)<<"Zhongba at speed of "<<setprecision(2)<<speed<<"km/h."<<endl;}    ~Zhongba(){cout<<"A Zhongba is erased!"<<endl;}};class Beiqi:public Automobile{protected:    double speed;public:    Beiqi(double s):speed(s){}    void run()const{cout<<setiosflags(ios::fixed)<<"Beiqi at speed of "<<setprecision(2)<<speed<<"km/h."<<endl;}    ~Beiqi(){cout<<"A Beiqi is erased!"<<endl;}};class Dayu:public Automobile{    protected:    double speed;public:    Dayu(double s):speed(s){}    void run()const{cout<<setiosflags(ios::fixed)<<"Dayu at speed of "<<setprecision(2)<<speed<<"km/h."<<endl;}    ~Dayu(){cout<<"A Dayu is erased!"<<endl;}};class Jianghuai:public Automobile{protected:    double speed;public:    Jianghuai(double s):speed(s){}    void run()const{cout<<setiosflags(ios::fixed)<<"Jianghuai at speed of "<<setprecision(2)<<speed<<"km/h."<<endl;}    ~Jianghuai(){cout<<"A Jianghuai is erased!"<<endl;}};class Driver{protected:    string name;    char type;public:    void Drive(Automobile *);    Driver(string n,char t):name(n),type(t){}    ~Driver(){}};void Driver::Drive(Automobile *automobile){    switch (type)    {    case 'A':        cout<<"Driver "<<name<<" can drive ";        automobile->run();        break;    case 'B':        if (typeid(*automobile) == typeid(Dayu) || typeid(*automobile) == typeid(Jianghuai))            cout<<"Driver "<<name<<" cannot drive large bus."<<endl;        else        {            cout<<"Driver "<<name<<" can drive ";            automobile->run();        }        break;    case 'C':        if (typeid(*automobile) != typeid(Benz) && typeid(*automobile) != typeid(Buick))            cout<<"Driver "<<name<<" cannot drive bus."<<endl;        else        {            cout<<"Driver "<<name<<" can drive ";            automobile->run();        }        break;    }}int main(){    string name;    char type;    double speed;    char automobileType;    int cases;    Automobile *automobile;    cin>>cases;    for (int i = 0; i < cases; i++)    {        cin>>name>>type>>automobileType>>speed;        Driver driver(name, type);        switch (automobileType)        {        case 'a':            automobile = new Benz(speed);            break;        case 'b':            automobile = new Buick(speed);            break;        case 'c':            automobile = new Zhongba(speed);            break;        case 'd':            automobile = new Beiqi(speed);            break;        case 'e':            automobile = new Dayu(speed);            break;        case 'f':            automobile = new Jianghuai(speed);            break;        }        driver.Drive(automobile);        delete automobile;    }    return 0;}