《C面向对象程序设计答案解析》-第五章谭浩强-清华大学出版社.docx

1:

#include

using namespace std;

class Student

{public:

void get_value()

{cin>>num>>name>>sex;}

void display( )

{cout<<"num: "<

cout<<"name: "<

cout<<"sex: "<

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: "<

cout<<"address: "<

// 引用派生类的私有成员，正确。private:

int age;

char addr[30];

};

int main()

{Student1 stud1;

stud1.get_value_1();

stud1.display();

stud1.display_1();

return 0;

}

2:

#include

using namespace std;

class Student

{public:

void get_value()

{cin>>num>>name>>sex;}

void display( )

{cout<<"num: "<

cout<<"name: "<

cout<<"sex: "<

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: "<

cout<<"address: "<

int age;

char addr[30];

};

int main()

{Student1 stud1;

stud1.get_value_1();

stud1.display_1();

return 0;

}

3:

#include

using namespace std;

class Student// 声明基类{public:// 基类公用成员void get_value();

void display( );

protected :// 基类保护成员int num;

char name[10];

char sex;

};

void Student::get_value()

{cin>>num>>name>>sex;}

void Student::display( )

{cout<<"num: "<

cout<<"name: "<

cout<<"sex: "<

}

class Student1: protected Student

// 声明一个保护派生类{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: "<

cout<<"name: "<

cout<<"sex: "<

cout<<"age: "<

cout<<"address: "<

}

int main( )

{Student1 stud1;//stud1是派生类student1类的对象stud1.get_value_1();// 调用派生类对象stud1的公用成员函数stud1.display1( );// 调用派生类对象stud1的公用成员函数return 0;

}

4: 解法一

#include

using namespace std;

class Student// 声明基类

{public:// 基类公用成员

void get_value();

void display( );

protected :

// 基类保护成员

int num;

char name[10];

char sex;

};

void Student::get_value()

{cin>>num>>name>>sex;}

void Student::display( )

{cout<<"num: "<

cout<<"name: "<

cout<<"sex: "<

}

class Student1: public Student// 声明一个公用派生类{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: "<

cout<<"name: "<

cout<<"sex: "<

cout<<"age: "<

cout<<"address: "<

}

int main( )

{Student1 stud1;//stud1是派生类student1类的对象

stud1.get_value_1();// 调用派生类对象stud1的公用成员函数get_value_1

stud1.display1();// 调用派生类对象stud1的公用成员函数display1

return 0;

}

解法二

#include

using namespace std;

class Student {public:// 声明基类

// 基类公用成员

void get_value();

void display( );

protected :

int num;

char name[10];

char sex;

// 基类保护成员

};

void Student::get_value()

{cin>>num>>name>>sex;}

void Student::display( )

{cout<<"num: "<

cout<<"name:"<

cout<<"sex:"<

}

class Student1: protected Student

{public:

// 声明一个公用派生类

void get_value_1();

void display1( );

private:

int age;

char addr[30];

};

void Student1::get_value_1()

{cin>>age>>addr;}

void Student1::display1( )

{cout<<"age:"<

cout<<"address:"<

}

int main( )

{Student1 stud1;//stud1是派生类student1类的对象stud1.get_value();

stud1.get_value_1();

stud1.display( );

stud1.display1();// 合法。 display1是派生类中的公用成员函数return 0;

}

5：

class A//A为基类

{public:

void f1( );

int i;

protected:

void f2();

int j;

private:

int k;

};

class B: public A//B为A的公用派生类{public:

void f3( );

protected:

int m;

private:

int n;

};

. class C: public B//C为 B的公用派生类

{public:

void f4();

private:

int p;

};

int main()

{A a1;//a1是基类 A 的对象

B b1;//b1是派生类 B 的对象

C c1;//c1是派生类 C 的对象

return 0;

}

6 ：

#include

using namespace std;

class A

{public:

void f1( );

protected:

void f2();

private:

int i;

};

class B: public A {public:

void f3( );

int k;

private:

int m;

};

class C: protected B {public:

void f4(); protected:

int n;

private:

int p;

};

class D: private C {public:

void f5(); protected:

int q;

private:

int r;

};

int main()

{A a1;

B b1;

C c1;

D d1;

return 0;

}

7：

#include using namespace std; class A

{

public:

A(){a=0;b=0;}

A(int i){a=i;b=0;}

A(int i,int j){a=i;b=j;}

void display(){cout<<"a="<

~A(){cout<<"destructing A "<

class B : public A

{

public:

B(){cout<<"constructing B "<

~B(){cout<<"destructing B "<

class C : public B

{

public:

C(){cout<<"constructing C "<

int main()

{ C c1;

return 0;

}

9：

#include

#include

using namespace std;

class Teacher

{public:

Teacher(string nam,int a,char s,string tit,string ad,string t);

void display();

protected:

string name;

int age;

char sex;

string title;

string addr;

string tel;

};

Teacher::Teacher(string nam,int a,char s,string tit,string ad,string t): name(nam),age(a),sex(s),title(tit),addr(ad),tel(t){ }

void Teacher::display()

{cout<<"name:"<

cout<<"age"<

cout<<"sex:"<

cout<<"title:"<

cout<<"address:"<

cout<<"tel:"<

}

class Cadre

{public:

Cadre(string nam,int a,char s,string p,string ad,string t);

void display();

protected:

string name;

int age;

char sex;

string post;

string addr;

string tel;

};

Cadre::Cadre(string nam,int a,char s,string p,string ad,string t): name(nam),age(a),sex(s),post(p),addr(ad),tel(t){}

void Cadre::display()

{cout<<"name:"<

cout<<"age:"<

cout<<"sex:"<

cout<<"post:"<

cout<<"address:"<

cout<<"tel:"<

}

eacher,public Cadre

class Teacher_Cadre:public

T {public:

Teacher_Cadre(string nam,int a,char s,string tit,string p,string ad,string t,float w);

void show( );

private:

float wage;

};

Teacher_Cadre::Teacher_Cadre(string nam,int a,char s,string t,string p,string ad,string tel,float w):

Teacher(nam,a,s,t,ad,tel),Cadre(nam,a,s,p,ad,tel),wage(w) {}

void Teacher_Cadre::show( )

{Teacher::display();

cout<<"post:"<

cout<<"wages:"<

}

int main( )

{Teacher_Cadre te_ca("Wang-li",50,'f',"prof.","president","135Beijing