第十一周项目2 继承之职员信息薪水类

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/*         *Copyright(c) 2016,烟台大学计算机学院         *作    者:刘金石         *完成日期:2016年5月10日         *问题描述:(1)定义一个名为CPerson的类,有以下私有成员:姓名、身份证号、性别和年龄,成员函数:构造函数、析构函数、输出信息的函数。并在此基础上派生出CEmployee类,派生类CEmployee增加了两个新的数据成员,分别用于表示部门和薪水。要求派生类CEmployee的构造函数显示调用基类CPerson的构造函数,并为派生类CEmployee定义析构函数,定义输出信息的函数。 */#include<iostream>#include<iomanip>using namespace std;class CPerson{protected:    string m_szName;    string m_szId;    int m_nSex;//0:women,1:man    int m_nAge;public:    CPerson(string name,string id,int sex,int age);    void Show1();    ~CPerson();};CPerson::~CPerson(){}CPerson::CPerson(string name,string id,int sex,int age):m_szName(name),m_szId(id),m_nSex(sex), m_nAge(age){}void CPerson::Show1(){    cout<<setw(10)<<m_szName<<setw(25)<<m_szId;    if(m_nSex==0)        cout<<setw(7)<<"women";    else        cout<<setw(7)<<"man";    cout<<setw(5)<<m_nAge<<endl;}class CEmployee:public CPerson{private:    string m_szDepartment;    double m_Salary;public:    CEmployee(string name,string id,int sex,int age,string department,double salary);    void Show2();    ~CEmployee();};CEmployee:: CEmployee(string name,string id,int sex,int age,string department,double salary):    CPerson(name,id,sex,age),m_szDepartment(department),m_Salary(salary){}void CEmployee::Show2(){    cout<<setw(10)<<"name"<<setw(25)<<"id"<<setw(7)<<"sex"<<setw(5)<<"age"<<setw(12)<<"department"<<setw(10)<<"salary"<<endl;    cout<<setw(10)<<m_szName<<setw(25)<<m_szId;    if(m_nSex==0)        cout<<setw(7)<<"women";    else        cout<<setw(7)<<"man";    cout<<setw(5)<<m_nAge;    //由于基类CPerson的成员变量采用了protected属性,因此可采用上述述代码实现,否则若    //基类CPerson的成员变量采用了privated属性,则只能使用CPerson::Show1();实现    cout<<setw(12)<<m_szDepartment<<setw(10)<<m_Salary<<endl;}CEmployee::~CEmployee() {}int main(){    string name,id,department;    int sex,age;    double salary;    cout<<"input employee's name,id,sex(0:women,1:man),age,department,salary:\n";    cin>>name>>id>>sex>>age>>department>>salary;    CEmployee employee1(name,id,sex,age,department,salary);    employee1.Show2();    return 0;}

运行结果:


/* (2)字符串除了用C++扩充的string类型外,按C语言的传统, 还可以用char *表示。请将类声明中的string全部改为char *后, 重新写一遍程序(此时的区别是,类中有指针成员,构造和 析构函数需要考虑深复制的问题了。) */#include<iostream>#include<iomanip>#include<string.h>using namespace std;class CPerson{protected:    char * m_szName;    char * m_szId;    int m_nSex;//0:women,1:man    int m_nAge;public:    CPerson(char * name,char * id,int sex,int age);    void Show1();    ~CPerson();};CPerson::~CPerson(){}CPerson::CPerson(char * name,char * id,int sex,int age){    m_szName=new char[strlen(name)+1];    strcpy(m_szName,name);    m_szId=new char[strlen(id)+1];    strcpy(m_szId,id);    m_nSex=sex;    m_nAge=age;}void CPerson::Show1(){    cout<<setw(10)<<m_szName<<setw(25)<<m_szId;    if(m_nSex==0)        cout<<setw(7)<<"women";    else        cout<<setw(7)<<"man";    cout<<setw(5)<<m_nAge<<endl;}class CEmployee:public CPerson{private:    char * m_szDepartment;    double m_Salary;public:    CEmployee(char * name,char * id,int sex,int age,char * department,double salary);    void Show2();    ~CEmployee();};CEmployee:: CEmployee(char * name,char * id,int sex,int age,char * department,double salary):    CPerson(name,id,sex,age),m_Salary(salary){    m_szDepartment=new char[strlen(department)+1];    strcpy(m_szDepartment,department);}void CEmployee::Show2(){    cout<<setw(10)<<"name"<<setw(25)<<"id"<<setw(7)<<"sex"<<setw(5)<<"age"<<setw(12)<<"department"<<setw(10)<<"salary"<<endl;    cout<<setw(10)<<m_szName<<setw(25)<<m_szId;    if(m_nSex==0)        cout<<setw(7)<<"women";    else        cout<<setw(7)<<"man";    cout<<setw(5)<<m_nAge;    //由于基类CPerson的成员变量采用了protected属性,因此可采用上述述代码实现,否则若    //基类CPerson的成员变量采用了privated属性,则只能使用CPerson::Show1();实现    cout<<setw(12)<<m_szDepartment<<setw(10)<<m_Salary<<endl;}CEmployee::~CEmployee() {}int main(){    char * name,*id,*department;    int sex,age;    double salary;    name=new char[10];    id=new char[19];    department=new char[10];    cout<<"input employee's name,id,sex(0:women,1:man),age,department,salary:\n";    cin>>name>>id>>sex>>age>>department>>salary;    CEmployee employee1(name,id,sex,age,department,salary);    employee1.Show2();    return 0;}
运行结果:

同上

学习心得:

          对于子类的深复制,如果基类的构造函数中已经为变量完成了深复制,那么在子类的构造函数中就不需要为继承过来的变量进行深复制,只需要为增加的指针变量深复制即可。

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