第五章第十题

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#include <iostream>#include <cstring>using namespace std;class Teacher                                //教师类 {public:  Teacher(int,char [],char);               //声明构造函数    void display();                          //声明输出函数  private:   int num;   char name[20];   char sex;  };Teacher::Teacher(int n,char nam[],char s)    //定义构造函数 {num=n;  strcpy(name,nam);  sex=s;}void Teacher::display()                      //定义输出函数 {cout<<"num:"<<num<<endl;  cout<<"name:"<<name<<endl;  cout<<"sex:"<<sex<<endl;}class BirthDate                               //生日类 {public:    BirthDate(int,int,int);                   //声明构造函数    void display();                           //声明输出函数    void change(int,int,int);                 //声明修改函数  private:    int year;    int month;    int day;};BirthDate::BirthDate(int y,int m,int d)       //定义构造函数 {year=y;  month=m;  day=d; }void BirthDate::display()                     //定义输出函数 {cout<<"birthday:"<<month<<"/"<<day<<"/"<<year<<endl;}void BirthDate::change(int y,int m,int d)     //定义修改函数 {year=y;  month=m;  day=d; }class Professor:public Teacher                         //教授类 {public:    Professor(int,char [],char,int,int,int,float);    //声明构造函数    void display();                                   //声明输出函数    void change(int,int,int);                         //声明修改函数   private:    float area;    BirthDate birthday;                               //定义BirthDate类的对象作为数据成员 };Professor::Professor(int n,char nam[20],char s,int y,int m,int d,float a): Teacher(n,nam,s),birthday(y,m,d),area(a){ }          //定义构造函数void Professor::display()                             //定义输出函数{Teacher::display(); birthday.display(); cout<<"area:"<<area<<endl;}void Professor::change(int y,int m,int d)             //定义修改函数 {birthday.change(y,m,d); }int main(){Professor prof1(3022,"LIU",'m',1949,1,1,125.4);   //定义Professor对象prof1 cout<<endl<<"original data:"<<endl; prof1.display();                                     //调用prof1对象的display函数 cout<<endl<<"new data:"<<endl; prof1.change(1955,3,2);                              //调用prof1对象的change函数 prof1.display();                                     //调用prof1对象的display函数 return 0;}
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