c++面向对象程序设计 谭浩强 第五章答案
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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; //引用派生类的私有成员,正确。
cout<<"address: "<<addr<<endl; //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 <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; //引用派生类的私有成员,正确。
cout<<"address: "<<addr<<endl; //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_1();
return 0;
3:
#include <iostream>
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: "<<num<<endl;
cout<<"name: "<<name<<endl;
cout<<"sex: "<<sex<<endl;
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: "<<num<<endl; //引用基类的保护成员
cout<<"name: "<<name<<endl; //引用基类的保护成员
cout<<"sex: "<<sex<<endl; //引用基类的保护成员
cout<<"age: "<<age<<endl; //引用派生类的私有成员
cout<<"address: "<<addr<<endl; //引用派生类的私有成员
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 <iostream>
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: "<<num<<endl;
cout<<"name: "<<name<<endl;
cout<<"sex: "<<sex<<endl;
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: "<<num<<endl; //引用基类的保护成员,合法
cout<<"name: "<<name<<endl; //引用基类的保护成员,合法
cout<<"sex: "<<sex<<endl; //引用基类的保护成员,合法
cout<<"age: "<<age<<endl; //引用派生类的私有成员,合法
cout<<"address: "<<addr<<endl; //引用派生类的私有成员,合法
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 <iostream>
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: "<<num<<endl;
cout<<"name:"<<name<<endl;
cout<<"sex:"<<sex<<endl;
class Student1: protected 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()
cin>>age>>addr;
void Student1::display1( )
cout<<"age:"<<age<<endl;
cout<<"address:"<<addr<<endl;
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是派生类C的对象
return 0;
6:
#include <iostream>
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 <iostream>
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<<" b="<<b;
private:
int a;
int b;
;
class B : public A
public:
B()c=0;
B(int i):A(i)c=0;
B(int i,int j):A(i,j)c=0;
B(int i,int j,int k):A(i,j)c=k;
void display1()
display();
cout<<" c="<<c<<endl;
private:
int c;
;
int main()
B b1;
B b2(1);
B b3(1,3);
B b4(1,3,5);
b1.display1();
b2.display1();
b3.display1();
b4.display1();
return 0;
8:
#include <iostream>
using namespace std;
class A
public:
A()cout<<"constructing A "<<endl;
~A()cout<<"destructing A "<<endl;
;
class B : public A
public:
B()cout<<"constructing B "<<endl;
~B()cout<<"destructing B "<<endl;
;
class C : public B
public:
C()cout<<"constructing C "<<endl;
~C()cout<<"destructing C "<<endl;
;
int main()
C c1;
return 0;
9:
#include<string>
#include <iostream>
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:"<<name<<endl;
cout<<"age"<<age<<endl;
cout<<"sex:"<<sex<<endl;
cout<<"title:"<<title<<endl;
cout<<"address:"<<addr<<endl;
cout<<"tel:"<<tel<<endl;
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:"<<name<<endl;
cout<<"age:"<<age<<endl;
cout<<"sex:"<<sex<<endl;
cout<<"post:"<<post<<endl;
cout<<"address:"<<addr<<endl;
cout<<"tel:"<<tel<<endl;
class Teacher_Cadre:public Teacher,public Cadre
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:"<<Cadre::post<<endl;
cout<<"wages:"<<wage<<endl;
int main( )
Teacher_Cadre te_ca("Wang-li",50,‘f‘,"prof.","president","135 Beijing Road,Shanghai","(021)61234567",1534.5);
te_ca.show( );
return 0;
10:
#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(3012,"Zhang",‘f‘,1949,10,1,125.4); //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(1950,6,1); //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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