第十一周项目三 职员有薪水了（派生类，含深复制）

（1）

项目要求

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。

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();
};

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();
};

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;
}

下面的运行结果供参考：

 

代码如下

#include <iostream>
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();

};

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();

};

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()
{
    string s;
    if(m_nSex==0)
        s="woman";
    else
        s="man";
    cout<<m_szName<<'\t'<<m_szId<<'\t'<<s<<'\t'<<m_nAge;
}
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<<"name\t"<<"id\t\t"<<"sex\t"<<"age\t"<<"department\t"<<"salary"<<endl;
    Show1();
    cout<<'\t'<<m_szDepartment<<"\t\t"<<m_Salary<<endl;
}


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

 

学习心得

没懂析构函数有什么作用…自己给删掉了= =

 

（2）

项目要求

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。）

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();
};
class CEmployee:public CPerson
{
private:
    char *m_szDepartment;
    float m_Salary;
public:
    CEmployee(char *name,char *id,int sex,int age,char *department,float salary);
    void Show2();
    ~CEmployee();
};
int main()
{
    char name[10],id[19],department[10];
    int sex,age;
    float 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;
}

 

代码如下

#include <iostream>
#include <cstring>
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();
};
class CEmployee:public CPerson
{
private:
    char *m_szDepartment;
    float m_Salary;
public:
    CEmployee(char *name,char *id,int sex,int age,char *department,float salary);
    void Show2();
    ~CEmployee();
};


CPerson::CPerson(char *name,char *id,int sex,int age)
{
    m_szName = new char [strlen(name)+1];
    strcpy(m_szName,name);//不要忘了atrcpy
    m_szId = new char [strlen(id)+1];
    strcpy(m_szId,id);
    m_nSex=sex;
    m_nAge=age;
}
void CPerson::Show1()
{
    string s;
    if(m_nSex==0)
        s="woman";
    else
        s="man";
    cout<<m_szName<<'\t'<<m_szId<<'\t'<<s<<'\t'<<m_nAge;
}
CPerson::~CPerson()
{
    delete []m_szName;
    delete []m_szId;
}

CEmployee::CEmployee(char *name,char *id,int sex,int age,char *department,float salary):
    CPerson(name,id,sex,age),m_Salary(salary)
    {
        m_szDepartment = new char [strlen(department)+1];
        strcpy(m_szDepartment,department);
    }

void CEmployee::Show2()
{

    cout<<"name\t"<<"id\t\t"<<"sex\t"<<"age\t"<<"department\t"<<"salary"<<endl;
    Show1();
    cout<<'\t'<<m_szDepartment<<"\t\t"<<m_Salary<<endl;
}
CEmployee::~CEmployee()
{
    delete []m_szDepartment;
}

int main()
{
    char name[10],id[19],department[10];
    int sex,age;
    float 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

 

学习心得

要记得strlen strcpy的使用！！