课程首页地址：http://blog.csdn.net/sxhelijian/article/details/7910565，本周题目链接：http://blog.csdn.net/sxhelijian/article/details/8894095
【项目3】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:
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(); //需要释放建立对象时动态分配的内存
};
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;
}
下面的运行结果供参考：
参考解答：
#include <iostream>#include <string.h>#include <iomanip>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); 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; //setw:设置输出数据的宽度,使用时应#include <iomanip.h> if(m_nSex==0) cout<<setw(7)<<"women"; else cout<<setw(7)<<"man"; cout<<setw(5)<<m_nAge<<endl;}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_szDepartment=new char[strlen(department)+1]; strcpy(m_szDepartment,department); m_Salary=salary;}void CEmployee::Show2()//注意派生类输出函数应输出所有成员变量（含基类继承的成员变量）的值{ 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::Show();实现 cout<<setw(12)<<m_szDepartment<<setw(10)<<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;}