friend关键字使用之雇员与雇主类-C++

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/*
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功能：雇员与雇主类.
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日期：2013-11-07
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*/
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#include <iostream>
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#include <string>
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using namespace std;
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class Employer;
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//雇员
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class Employee
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{
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public:
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  Employee(int aNum=0,string aName=NULL,int aPay=0,int aGrade=0,string aPosition=NULL);
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  ~Employee();
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   void Display(void);
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   void setEmployee(void);
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   string getName(void);
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   friend Employer;
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private:
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  int m_aNumber;
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  string m_aName;
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  int m_aPay;
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  int m_aGrade;
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    string m_aPosition;
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};
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//雇主
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class Employer
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{
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public:
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  Employer(int iNumber=0,string iName=NULL);
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    ~Employer();
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  void resetEmployee(Employee&);
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  string getName();
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    void Display(Employee &);
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private:
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   int m_iNumber;
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   string m_iName;
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};
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Employee::Employee(int aNum,string aName,int aPay,int aGrade,string aPosition)
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{
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     m_aNumber=aNum;
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   m_aName=aName;
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   m_aPay=aPay;
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   m_aGrade=aGrade;
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   m_aPosition=aPosition;
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}
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Employee::~Employee()
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{
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}
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Employer::Employer(int iNumber,string iName)
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{
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        m_iNumber=iNumber;
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    m_iName=iName;
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}
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Employer::~Employer()
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{
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};
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string Employee::getName(void)
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{
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  return m_aName;
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}
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void Employee::Display(void)
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{
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   cout<<m_aNumber<<" "<<m_aName<<" "<<m_aPay<<" "<<m_aGrade<<" "<<m_aPosition;
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}
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void Employer::resetEmployee(Employee&obj)
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{
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   cout<<"请输入新的薪水、等级和职位：";
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     cin>>obj.m_aPay>>obj.m_aGrade>>obj.m_aPosition;
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}
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void Employer::Display(Employee &obj)
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{
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  cout<<m_iName<<"老板调整了"<<obj.getName()<<"的信息:";
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  obj.Display();
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}
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int main(void)
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{
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  int number;
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  string name;
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  int pay;
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  int grade;
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  string position;
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  int i;
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  cout<<"请输入员工的编号、姓名、薪水、等级和职位：";
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  cin>>number>>name>>pay>>grade>>position;
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    Employee employee1(number,name,pay,grade,position);
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  cout<<"请输入员工的编号、姓名、薪水、等级和职位：";
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  cin>>number>>name>>pay>>grade>>position;
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  Employee employee2(number,name,pay,grade,position);
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  cout<<"请输入老板的编号和姓名：";
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  cin>>number>>name;
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    Employer employer1(number,name);
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  cout<<"请输入要修改人的序号："<<endl;
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  cout<<"1."<<employee1.getName()<<endl;
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    cout<<"2."<<employee2.getName()<<endl;
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  cin>>i;
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  if (i==1)
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  {
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    employer1.resetEmployee(employee1);
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    employer1.Display(employee1);
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  }
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  else if (i==2)
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  {
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    employer1.resetEmployee(employee2);
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    employer1.Display(employee2);
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  }
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  else
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  {
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      cout<<"输入有误";
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  }
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  cout<<endl;
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  system("pause");
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  return 0;
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}