emp.h

一本很好的C++学习的丛书！初学者必看的

// emp.h -- header file for abstr_emp class and children

#include <iostream>
#include <string>

class abstr_emp
{
private:
    std::string fname;    // abstr_emp's first name
    std::string lname;    // abstr_emp's last name
    std::string job;
public:
    abstr_emp();
    abstr_emp(const std::string & fn, const std::string &  ln,
             const std::string &  j);
    virtual void ShowAll() const;    // labels and shows all data
    virtual void SetAll();        // prompts user for values
    friend std::ostream & operator<<(std::ostream & os, const abstr_emp & e);
    // just displays first and last name
    virtual ~abstr_emp() = 0;         // virtual base class
};

class employee : public abstr_emp
{
public:
    employee();
    employee(const std::string & fn, const std::string &  ln,
             const std::string &  j);
    virtual void ShowAll() const;
    virtual void SetAll();
};

class manager:  virtual public abstr_emp
{
private:
    int inchargeof;        // number of abstr_emps managed
protected:
    int InChargeOf() const { return inchargeof; } // output
    int & InChargeOf(){ return inchargeof; }      // input
public:
    manager();
    manager(const std::string & fn, const std::string & ln,
            const std::string & j, int ico = 0);
    manager(const abstr_emp & e, int ico);
    manager(const manager & m);
    virtual void ShowAll() const;
    virtual void SetAll();
};

class fink: virtual public abstr_emp
{
private:
    std::string reportsto;        // to whom fink reports
protected:
    const std::string ReportsTo() const { return reportsto; }
    std::string & ReportsTo(){ return reportsto; }
public:
    fink();
    fink(const std::string & fn, const std::string & ln,
         const std::string & j, const std::string & rpo);
    fink(const abstr_emp & e, const std::string & rpo);
    fink(const fink & e);
    virtual void ShowAll() const;
    virtual void SetAll();
};

class highfink: public manager, public fink // management fink
{
public:
    highfink();
    highfink(const std::string & fn, const std::string & ln,
             const std::string & j, const std::string & rpo,
             int ico);
    highfink(const abstr_emp & e, const std::string & rpo, int ico);
    highfink(const fink & f, int ico);
    highfink(const manager & m, const std::string & rpo);
    highfink(const highfink & h);
    virtual void ShowAll() const;
    virtual void SetAll();
};