实验4继承与派生

1、实验4 继承与派生班级 网络1311 学号 39 姓名 付豪 成绩 一、实验目的1. 熟练掌握类的继承,能够定义和使用类的继承关系2. 掌握派生类的声明与实现方法3. 掌握类构造函数的初始化列表与作用域分辨率的使用方法4. 理解虚基类在解决二义性问题中的作用.二、实验内容1定义一个基类有姓名、性别、年龄，再由基类派生出教师类和学生类，教师类增加工号、职称和工资，学生类增加学号、班级、专业和入学成绩，在main()函数中定义基类和派生类对象，对类进行测试。2声明一个哺乳动物Mammal类，再由此派生出狗Dog类，声明一个Dog类的对象，观察基类与派生类的构造函数与析构函数的调用顺序。3定义一个P

2、oint类，派生出矩形类Rectangle和圆类Circle，计算各派生类对象的面积Area()。4设计一个圆类circle和一个桌子类table，另设计一个圆桌类roundtable，它是从前两个类派生的，要求输出一个圆桌的高度、面积和颜色等数据。 5定义一个大学生类student，函数私有数据成员：姓名、学号、校名，并为它定义带参数的构造函数，参数带缺省值的构造函数和输出数据成员值的print()公有成员函数，另定义研究生类，它以公有继承方式派生于类student，新增加“研究方向、导师名”两个私有数据成员，并定义带参数的构造函数和输出研究生数据的print()公有成员函数。在main()

3、函数中定义基类和派生类对象，对类进行测试。三、实验源程序、测试与结论1#include<iostream>#include<string>using namespace std;class personstring name; char sex;int age;public:person(string n,char s,int a):name(n),sex(s),age(a) void show()cout<<name<<endl; cout<<sex<<endl;cout<<age<<endl;c

4、lass teacher:public personint num; string job; int money;public:teacher(string n,char s,int a,int nu,string j,int m):person(n,s,a),num(nu),job(j),money(m) void show()person:show();cout<<num<<endl;cout<<job<<endl;cout<<money<<endl;class student:public personint num

5、; string Class; string zhuanye; float sorce;public:student(string n,char s,int a,int nu,string C,string z,float ss):person(n,s,a),num(nu),Class(C),zhuanye(z),sorce(ss) void show()person:show(); cout<<num<<endl;cout<<Class<<endl;cout<<zhuanye<<endl;cout<<sorc

6、e<<endl;void main() teacher t1("Fsda",'M',1234,74,"jiaoshi",8000); student s1("Hfgh",'F',1145,1001,"BX1311","wangluo",511); t1.show();cout<<endl<<endl;s1.show();2#include<iostream>using namespace std;class Mamm

7、alpublic:Mammal()cout<<"Mammal构造"<<endl;Mammal()cout<<"Mammal析构"<<endl;class Dog:public Mammalpublic:Dog()cout<<"Dog构造"<<endl;Dog()cout<<"Dog析构"<<endl;void main() Dog a;3.#include<iostream>using namespace s

8、td;class Pointdouble x;double y;public:Point(double x,double y):x(x),y(y)void show()cout<<"("<<x<<","<<y<<")"<<endl;class Rectangle:public Point double x, y;public:Rectangle(double x,double y,double x1,double y1):Point(x,y),x(x1),y(y1

9、)void Area()Point:show();cout<<"Ãæ»ý:"<<x*y<<endl;class Circle:public Pointdouble r;public:Circle(double x,double y,double c):Point(x,y),r(c)void Area()Point:show();cout<<"Ãæ»ý:"<<r*r*3.14<<endl;void main

10、() Rectangle f2(5,6,7,8); Circle f3(1,2,3);f2.Area();f3.Area();4.#include<iostream>#include<string>using namespace std;class Circleint r;public:Circle(int r1)r=r1;class Tableint h;string color;public:Table(int h1,string c1)h=h1;color=c1;class Roundtable:public Circle,public Tablepublic:R

11、oundtable(int x,int y,string z):Circle(x),Table(y,z) cout<<"高度："<<x<<"面积："<<y<<"颜色："<<z<<endl;void main() string c; cout<<"请输入颜色："<<endl;cin>>c;Roundtable a(7,11,c);5.#include<iostream>#include&

12、lt;string>using namespace std;class student protected: string name; int num; string school;public:student(string n="hi",int a=0,string b="bey"):name(n),num(a),school(b)void print() cout<<"name:"<<name<<endl; cout<<"num:"<< num&

13、lt;<endl; cout<<"school:"<<school<<endl;class graduate:public student string research_area;string tutor_name;public:graduate(string a,int b,string c,string d,string e): student(a,b,c),research_area(d),tutor_name(e)void print() cout<<"name:"<<name&

14、lt;<endl; cout<<"num:"<< num<<endl; cout<<"school:"<<school<<endl;/*/student:print();cout<<"research_area:"<<research_area<<endl;cout<<"tutor_name:"<<tutor_name<<endl;void main() graduate g("Fsda",17,"DJ","wangluo","Tao"); cout<<"graduate:"<<endl