僱員僱主類，實現單件模式，繼承，鏈表，友元等

僱員僱主類，寫得比較垃圾。。。請多多指教和關照。

主要的是在設計，按照現實中僱員和僱主的關係，應該爲雙向關聯，僱主可以修改僱員的工資，職位等。

僱員知道自己的僱主是誰。

一個僱主有很多僱員，而一個僱員只能有一個僱主。

通過設置僱員的友元函數，通過僱主來修改僱員的信息。

僱主類中存在一個僱員類的頭指針，可以通過該頭指針訪問到所有的僱員。僱主可以動態的維護該鏈表。

僱員類中存在一個僱主類的指針，用來訪問和設置僱主。

代碼如下

包括 7個文件。3個頭文件，4個源文件。

/******************************************************代碼頭文件**********************************************************/ //Person.h //實現繼承，僱員和僱主都爲人，所以設置該類。 #ifndef PERSON_H_ #define PERSON_H_ #include <iostream> #include <string> using std::string; class Person { public: Person(const string aName="MaoYadong",const string aGender="ÄÐ",const int aAge=20); ~Person(); void setName(const string aName); void setGender(const string aGender); void setAge(const int aAge); string getName() const; string getGender() const; int getAge() const; protected: string m_strName; string m_strGender; int m_iAge; }; #endif //Employer.h //實現僱主類。實現單件模式，通過友元函數修改僱員的工資等信息。 #ifndef EMPLOYER_H_ #define EMPLOYER_H_ #include <iostream> #include <string> #include "person.h" //#include "employee.h" using std::string; class Employee; class Employer:public Person { public: //Employer(string aName,string aGender,int aAge,string aPos); static Employer *employerBuild(const string aName,const string aGender, const int aAge, const string aPos); ~Employer(); void setPos(const string aPos); void setEmployeeHead(Employee *aHead); Employee *getEmployeeHead() const; //friend of the class Employee: to set the salary,positon,level number of the employee: void setEmployeeSalary(Employee &aTemp, const double aSalary); void setEmployeePos(Employee &aTemp, const string aPos); void setEmployeeLevel(Employee &aTemp, const string aLevel); void setEmployeeNum(Employee &aTemp, const int aNum); string getPos() const; private: string m_strPos; Employer(); Employee *m_pEmployeeHead;//To save the head Pointer fo the employee: static Employer *p_employer; }; #endif //Employee.h //實現僱員類。 #ifndef EMPLOYEE_H_ #define EMPLOYEE_H_ #include "person.h" #include "employer.h" //class Employer; class Employee:public Person { public: //static Employee *employeeBuild(string aName,string aGender, int aAge, int aNum, string aLevel, string aPos, double aSalary); Employee(const string aName=NULL,const string aGender=NULL,const int aAge=0,const int aNum=0,const string aLever=NULL,const string aPos=NULL,const double aSalary=0); ~Employee(); void setNum(const int aNum); void setSalary(const double aSalary); void setLevel(const string aLevel); void setPos(const string aPos); void setEmployer(Employer *aEmployer);//set the employer of the employee: void setEmployeeNext(Employee *aEmployeeNext); Employer *getEmployer() const;//get the employer: Employee *getEmployeeNext() const; int getNum() const; string getLevel() const; string getPos() const; double getSalary() const; //friend; friend void Employer::setEmployeeLevel(Employee &aTemp, const string aLevel); friend void Employer::setEmployeeNum(Employee &aTemp, const int aNum); friend void Employer::setEmployeePos(Employee &aTemp, const string aPos); friend void Employer::setEmployeeSalary(Employee &aTemp, const double aSalary); private: //To recognize his BOSS: Employer *m_pEmployer; int m_iNum; string m_strLevel; string m_strPos; double m_dSalary; //To link the next employee : Employee *m_pEmployeeNext; }; #endif /*********************************************************程序代碼實現*************************************************************/ //Person.cpp #include <iostream> #include <string> #include "person.h" using std::string; Person::Person(string aName, string aGender, int aAge) { m_strName = aName; m_strGender = aGender; m_iAge = aAge; } Person::~Person() { ; } void Person::setName(string aName) { m_strName = aName; } void Person::setGender(string aGender) { m_strGender = aGender; } void Person::setAge(int aAge) { m_iAge = aAge; } string Person::getName() const { return m_strName; } string Person::getGender() const { return m_strGender; } int Person::getAge() const { return m_iAge; } //Employer.cpp #include "employer.h" #include "employee.h" #include "person.h" Employer *Employer::employerBuild(string aName, string aGender, int aAge, string aPos) { //Singleton: if(!p_employer) { p_employer = new Employer; p_employer->setPos(aPos); p_employer->setAge(aAge); p_employer->setName(aName); } return p_employer; } Employer *Employer::p_employer=0; Employer::Employer() { ; } Employer::~Employer() { ; } void Employer::setPos(string aPos) { m_strPos = aPos; } //get the head pointer of employee: void Employer::setEmployeeHead(Employee *aHead) { m_pEmployeeHead = aHead; } Employee *Employer::getEmployeeHead() const { return m_pEmployeeHead; } string Employer::getPos() const { return m_strPos; } void Employer::setEmployeeLevel(Employee &aTemp, string aLevel) { aTemp.setLevel(aLevel); //Employee::m_strLevel = aLevel; } void Employer::setEmployeeNum(Employee &aTemp, int aNum) { aTemp.setNum(aNum); } void Employer::setEmployeePos(Employee &aTemp, string aPos) { aTemp.setPos(aPos); } void Employer::setEmployeeSalary(Employee &aTemp, double aSalary) { aTemp.setSalary(aSalary); } //Employee.cpp #include "employee.h" #include "employer.h" #include <iostream> using std::cout; using std::endl; //Employee *Employee::employeeBuild(string aName,string aGender, int aAge, int aNum, string aLevel, string aPos, double aSalary) //{ // if(!p_employee) // { // p_employee = new Employee; // p_employee->setName(aName); // p_employee->setGender(aGender); // p_employee->setAge(aAge); // p_employee->setLevel(aLevel); // p_employee->setNum(aNum); // p_employee->setPos(aPos); // p_employee->setSalary(aSalary); // } // m_iEmployeeCount++; // return p_employee; //} Employee::Employee(string aName,string aGender,int aAge,int aNum,string aLevel,string aPos,double aSalary):Person(aName,aGender,aAge) { m_strName = aName; m_strGender = aGender; m_iAge = aAge; m_iNum =aNum; m_strLevel = aLevel; m_strPos = aPos; m_dSalary = aSalary; } Employee::~Employee() { ; } void Employee::setNum(int aNum) { m_iNum = aNum; } void Employee::setSalary(double aSalary) { m_dSalary = aSalary; } void Employee::setLevel(string aLevel) { m_strLevel = aLevel; } void Employee::setPos(string aPos) { m_strPos = aPos; } void Employee::setEmployer(Employer *aEmployer) { m_pEmployer = aEmployer; } void Employee::setEmployeeNext(Employee *aEmployee) { m_pEmployeeNext = aEmployee; } Employer *Employee::getEmployer() const { return m_pEmployer; } Employee *Employee::getEmployeeNext() const { return m_pEmployeeNext; } int Employee::getNum() const { return m_iNum; } string Employee::getLevel() const { return m_strLevel; } string Employee::getPos() const { return m_strPos; } double Employee::getSalary() const { return m_dSalary; } //Demo.cpp //主函數所在文件。 // singleton Derive #include <iostream> #include <string> #include "person.h" #include "employee.h" #include "employer.h" using std::cin; using std::cout; using std::endl; using std::string; void deleteEmployee(Employee *aHead); void viewEmployee(Employer *aEmployer); int main() { //Create New Employee Head: Employee *employeeHead = new Employee("MaoYaDong","M",20,2008013505,"1","DBA",10.234); employeeHead->setEmployeeNext(NULL); cout << "Employee->Name:" << employeeHead->getName() << endl; //Singleton: //Create New Employer : Employer *employer; employer = Employer::employerBuild("Maturn","M",20,"ÏîÄ¿¾­Àí"); cout << "Employer->Name: " << employer->getName() << endl; //Set the Employee To recognize his BOSS: employeeHead->setEmployer(employer); cout << employeeHead->getEmployer()->getName() << endl; //Set the Employer to recognize his employee: employer->setEmployeeHead(employeeHead); //Create New employee : Employee *employee_1 = new Employee("TestYadong","M",20,2008013506,"2","Program",20.456); employee_1->setEmployeeNext(NULL); cout << employee_1->getName() << endl; //New employee in the link: employeeHead->setEmployeeNext(employee_1); cout << "EmployeeHead->Name:" << employeeHead->getName() << endl; cout << "EmployeeHead->Next:" << employeeHead->getEmployeeNext()->getName() << endl; //Employer set salary,position and so on: cout << "Before set..." << endl; cout << employeeHead->getSalary() << endl; employer->setEmployeeSalary(*employeeHead,1111.11); cout << "After set..." << endl; cout << employeeHead->getSalary() << endl; //Set Position: cout << "Before set... " << endl; cout << "The position of this employee is :" << employeeHead->getPos() << endl; employer->setEmployeePos(*employeeHead,"ϵͳ¼Ü¹¹Ê¦"); cout << "After set... " << endl; cout << "The position of this employee is :" << employeeHead->getPos() << endl; //View the employee through his employer: cout << endl; cout << "******************************%My employee%********************************" << endl; //cout << "Here is the Employee of the Employer employer..." << endl; cout << endl; viewEmployee(employer); //free the space in the stack: deleteEmployee(employeeHead); return 0; } void deleteEmployee(Employee *aHead) { Employee *p_temp; while(!aHead) { p_temp = aHead; aHead=aHead->getEmployeeNext(); delete p_temp; } } void viewEmployee(Employer *aEmployer) { Employee *aTemp = aEmployer->getEmployeeHead(); //system("PAUSE"); while(aTemp) { cout << " ***************||***************** " << endl; cout << endl; cout << "The name of this employee is: " << aTemp->getName() << endl; cout << "The age of this Employee is: " << aTemp->getAge() << endl; cout << "The gender of this Employee is: " << aTemp->getGender() << endl; cout << "The Number of this Employee is: " << aTemp->getNum() << endl; cout << "The Position of this Employee is: " << aTemp->getPos() << endl; cout << "The Salary of this Employee is: " << "$" << aTemp->getSalary() << endl; cout << "The level of this Employee is: " << aTemp->getLevel() << endl; cout << endl; cout << " ***************||***************** " << endl; aTemp = aTemp->getEmployeeNext() ; } }