第五章

1.

#include<iostream>
using namespace std;   
class Student    
{public:    
void get_value()    
{cin>>num>>name>>sex;}   
void display( )    
{cout<<"num: "<<num<<endl;   
cout<<"name: "<<name<<endl;   
cout<<"sex: "<<sex<<endl;}   
private :   
int num;    
char name[10];  
char sex;   
};   
class Student1: public Student   
{public:    
void get_value_1()   
{get_value();    
cin>>age>>addr;}   
void display_1()    
{ 
cout<<"age: "<<age<<endl; 
cout<<"address: "<<addr<<endl;
}   
private:    
int age;    
char addr[30];   
};   
int main()    
{Student1 stud1;    
stud1.get_value_1();   
stud1.display();   
stud1.display_1();   
return 0;   
}   

2.

#include<iostream>

using namespace std;   

class Student   
{public:    
void get_value()    
{cin>>num>>name>>sex;}   
void display( )    
{cout<<"num: "<<num<<endl;   
cout<<"name: "<<name<<endl;   
cout<<"sex: "<<sex<<endl;}    
private :   
int num;    
char name[10];   
char sex;   
};   
class Student1: private Student   
{public:    
void get_value_1()   
{get_value();    
cin>>age>>addr;}   
void display_1()   
{display();    
cout<<"age: "<<age<<endl; 
cout<<"address: "<<addr<<endl;

}
private:    
int age;   
char addr[30];   
};   
int main()    
{Student1 stud1;    
stud1.get_value_1();   
stud1.display_1();   
return 0;   
}  

 

3.

#include<iostream>

using namespace std;    
class Student 
{public: 
void get_value();   
void display( );    
protected :
int num;   
char name[10];   
char sex;   
};   
void Student::get_value()   
{cin>>num>>name>>sex;}   
void Student::display( )    
{cout<<"num: "<<num<<endl;    
cout<<"name: "<<name<<endl;   
cout<<"sex: "<<sex<<endl;   
}   
class Student1: protected Student   
{public:    
void get_value_1();   
void display1( );   
private:    
int age;   
char addr[30];   
};   
void Student1::get_value_1()   
{get_value();    
cin>>age>>addr;   
}    
void Student1::display1( )   
{cout<<"num: "<<num<<endl;  
cout<<"name: "<<name<<endl;   
cout<<"sex: "<<sex<<endl;  
cout<<"age: "<<age<<endl;  
cout<<"address: "<<addr<<endl; 
}   
int main( )    
{Student1 stud1; 
stud1.get_value_1();  
stud1.display1( );  
return 0;   
}    

4.

#include<iostream>

using namespace std;   
class Student
{public:    
void get_value();   
void display( );    
protected :
int num;    
char name[10];   
char sex;   
};   
void Student::get_value()   
{cin>>num>>name>>sex;}   
void Student::display( )    
{cout<<"num: "<<num<<endl;   
cout<<"name: "<<name<<endl;   
cout<<"sex: "<<sex<<endl;   
}   
class Student1: public Student  
{public:    
void get_value_1();   
void display1( );   
private:    
int age;   
char addr[30];   
};   
void Student1::get_value_1()   
{get_value();    
cin>>age>>addr;   
}    
void Student1::display1( )    
{cout<<"num: "<<num<<endl; 
cout<<"name: "<<name<<endl;  
cout<<"sex: "<<sex<<endl; 
cout<<"age: "<<age<<endl;   
cout<<"address: "<<addr<<endl; 
}   
int main( )    
{Student1 stud1; 
stud1.get_value_1();    
stud1.display1( );   
return 0;   
}  

  

10.

#include <cstring>   
using namespace std;    
class Teacher   
{public:    
Teacher(int,char [],char);
void display();  
private:   
int num;    
char name[20];   
char sex;   
};   
Teacher::Teacher(int n,char nam[],char s)  
{num=n;    
strcpy(name,nam);   
sex=s;   
}   
void Teacher::display()   
{cout<<"num:"<<num<<endl;   
cout<<"name:"<<name<<endl;   
cout<<"sex:"<<sex<<endl;   
}   
class BirthDate  
{public:    
BirthDate(int,int,int);   
void display(); 
void change(int,int,int);   
private:   
int year;   
int month;   
int day;   
};   
BirthDate::BirthDate(int y,int m,int d)   
{year=y;   
month=m;   
day=d;   
}   
void BirthDate::display() 
{cout<<"birthday:"<<month<<"/"<<day<<"/"<<year<<endl;}   
void BirthDate::change(int y,int m,int d)   
{year=y;   
month=m;   
day=d;   
}   
class Professor:public Teacher   
{public:    
Professor(int,char [],char,int,int,int,float);   
void display();
void change(int,int,int);   
private:   
float area;    
BirthDate birthday;  
};   
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){ }   
void Professor::display()   
{Teacher::display();   
birthday.display();    
cout<<"area:"<<area<<endl;   
}   
void Professor::change(int y,int m,int d)   
{birthday.change(y,m,d);   
}   
int main()    
{Professor prof1(3012,"Zhang",'f',1949,10,1,125.4); 
cout<<endl<<"original data:"<<endl;    
prof1.display(); 
cout<<endl<<"new data:"<<endl;    
prof1.change(1950,6,1);   
prof1.display(); 
return 0;   
}