求c++ primer plus第14章编程练习3的答案

guangdongmutou 2011-01-09 11:24:21

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無_1024 2011-01-09

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俺们穷买不起那本书啊

matrixcl 2011-01-09

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哥们你够懒的，问问题都不带抄题目的

guangdongmutou 2011-01-09

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有空就帮忙看看，已经附上题目了[Quote=引用 2 楼 hnuqinhuan 的回复:]

俺们穷买不起那本书啊
[/Quote]

guangdongmutou 2011-01-09

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有空就帮忙看看，谢谢了。
[Quote=引用 1 楼 matrixcl 的回复:]

哥们你够懒的，问问题都不带抄题目的
[/Quote]

guangdongmutou 2011-01-09

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好吧，我把问题打上：

3.定义一个QueueTp模板。然后在一个类似于程序清单14.12的程序中创建一个指向Worker的指针队列（参见程序清单14.10中的定义），并使用该队列来测试它。

上面就是题目了。
再附上清单14.10和14.12



//14.10

// workermi.h  -- working classes with MI

#ifndef WORKERMI_H_

#define WORKERMI_H_



#include <string>



class Worker   // an abstract base class

{

private:

    std::string fullname;

    long id;

protected:

    virtual void Data() const;

    virtual void Get();

public:

    Worker() : fullname("no one"), id(0L) {}

    Worker(const std::string & s, long n)

            : fullname(s), id(n) {}

    virtual ~Worker() = 0; // pure virtual function

    virtual void Set() = 0;

    virtual void Show() const = 0;

};



class Waiter : virtual public Worker

{

private:

    int panache;

protected:

    void Data() const;

    void Get();

public:

    Waiter() : Worker(), panache(0) {}

    Waiter(const std::string & s, long n, int p = 0)

            : Worker(s, n), panache(p) {}

    Waiter(const Worker & wk, int p = 0)

            : Worker(wk), panache(p) {}

    void Set();

    void Show() const;

};



class Singer : virtual public Worker

{

protected:

enum {other, alto, contralto, soprano,

                    bass, baritone, tenor};

    enum {Vtypes = 7};

    void Data() const;

    void Get();

private:

    static char *pv[Vtypes];    // string equivs of voice types

    int voice;

public:

    Singer() : Worker(), voice(other) {}

    Singer(const std::string & s, long n, int v = other)

            : Worker(s, n), voice(v) {}

    Singer(const Worker & wk, int v = other)

            : Worker(wk), voice(v) {}

    void Set();

    void Show() const;

};



// multiple inheritance

class SingingWaiter : public Singer, public Waiter

{

protected:

    void Data() const;

    void Get();

public:

    SingingWaiter()  {}

    SingingWaiter(const std::string & s, long n, int p = 0,

                            int v = other)

            : Worker(s,n), Waiter(s, n, p), Singer(s, n, v) {}

    SingingWaiter(const Worker & wk, int p = 0, int v = other)

            : Worker(wk), Waiter(wk,p), Singer(wk,v) {}

    SingingWaiter(const Waiter & wt, int v = other)

            : Worker(wt),Waiter(wt), Singer(wt,v) {}

    SingingWaiter(const Singer & wt, int p = 0)

            : Worker(wt),Waiter(wt,p), Singer(wt) {}

    void Set();

    void Show() const; 

};



#endif





//14.12

// workmi.cpp -- multiple inheritance

// compile with workermi.cpp

#include <iostream>

#include <cstring>

#include "workermi.h"

const int SIZE = 5;



int main()

{

   using std::cin;

   using std::cout;

   using std::endl;

   using std::strchr;



   Worker * lolas[SIZE];



    int ct;

    for (ct = 0; ct < SIZE; ct++)

    {

        char choice;

        cout << "Enter the employee category:\n"

            << "w: waiter  s: singer  "

            << "t: singing waiter  q: quit\n";

        cin >> choice;

        while (strchr("wstq", choice) == NULL)

        {

            cout << "Please enter a w, s, t, or q: ";

            cin >> choice;

        }

        if (choice == 'q')

            break;

        switch(choice)

        {

            case 'w':   lolas[ct] = new Waiter;

                        break;

            case 's':   lolas[ct] = new Singer;

                        break;

            case 't':   lolas[ct] = new SingingWaiter;

                        break;

        }

        cin.get();

        lolas[ct]->Set();

    }



    cout << "\nHere is your staff:\n";

    int i;

    for (i = 0; i < ct; i++)

    {

        cout << endl;

        lolas[i]->Show();

    }

    for (i = 0; i < ct; i++)

        delete lolas[i];

    cout << "Bye.\n";

    return 0; 

}