实验六继承与派生

1、继承与组合一、实验目的1 .了解继承在面向对象程序设计中的重要作用。2 .进一步理解继承与派生的概念。3 .掌握通过继承派生出一个新的类的方法。4 .了解虚基类的作用和用法。5 .掌握类的组合二、实验内容1.请先阅读下面的程序，写出程序运行的结果，然后再上机运行程序，验证自己分析的结果是否正确。#includeusingnamespacestd;classApublic:A()coutA:A()called.n;virtualA()coutA:A()called.n;classB:publicApublic:B(inti)coutB:B()called.n;buf=newchari;)virt

2、ual-B()deletebuf;coutB:B()called.n;)private:char*buf;);voidfun(A*a)coutMayyousucceed!lied.Maj,1yousucceedfE:：TBcalled.R：called.exiteduithreturnvalue：0Pressanykeytocontinu.e.(2)#includeusingnamespacestd;classApublic:A(inta,intb):x(a),y(b)coutAconstructor.endl;voidAdd(inta,intb)x+=a;y+=b;voiddisplay()

3、cout(x,y);A()coutdestructorA”endl;private:intx,y;）；classB:privateAprivate:inti,j;AAobj;public:B(inta,intb,intc,intd):A(a,b),i(c),j(d),Aobj(1,1)coutBconstructor”endl;voidAdd(intx1,inty1,intx2,inty2)A:Add(x1,y1);i+=x2;j+=y2;voiddisplay()A:display();Aobj.display();cout(i,j)endl;B()coutdestructorB.dEStJ

4、LlCtOUF8.destmet;onF.工ilestrucLurft.Pocecscsxxtedwitli片目七unvalmiG3Pressduiiykeytocuntlime.微软拼音半=#includeusingnamespacestd;classApublic:A(inta):x(a)coutAconstructorxendl;intf()return+x;A()coutdestructorA”endl;private:intx;classB:publicvirtualAprivate:inty;AAobj;public:B(inta,intb,intc):A(a),y(c),Aobj

5、(c)coutBconstructor.yendl;intf()A:f();Aobj.f();return+y;voiddisplay()coutA:f()tAobj.f()tf()endl;B()coutdestructorB.endl;classC:publicBpublic:C(inta,intb,intc):B(a,b,c),A(0)coutCconstructor.endl;classD:publicC,publicvirtualApublic:D(inta,intb,intc):C(a,b,c),A(c)coutDconstructor.endl;D()coutdestructor

6、D.endl;Dd(7,8,9);d.f();d.display();return0;)(3)程序运行结果:Aconstructor.9Aconstructor.9Bconstructor.9Cconstructor.Dconstructor.121211destructorD.destructorB.destructorA.destructorA.D:c+6.3+exeRconstruLctor.于ACDnstmctor.9Bconstmetor-.9Cgonat111fcLic:七0ir.0constritetor.121211destruetorD.AestiMic1:isp3A.a.l

7、c.st-mGlrarHlesitrnictonFR.Proexitedwxtliireturnvalimc3Pressaunypkeytocontinue.瀚抖音半二(4)#includeusingnamespacestd;classBase1public:Base1()coutclassBase1!endl;classBase2public:Base2()(coutclassBase2!endl;);classLevel1:publicBase2,virtualpublicBase1(public:Level1()(coutclassLevel1!endl;);classLevel2:pu

8、blicBase2,virtualpublicBase1(public:Level2()(coutclassLevel2!endl;);classTopLevel:publicLevel1,virtualpublicLevel2public:TopLevel()(coutclassTopLevel!endl;);intmain()TopLevelobj;return0;(4)程序运行结果:classBase1!classBase12classLeve12!classBase2!classLeve11!DAc+6AexeelassBasel!，1或券0Ra,掌e2!】lai尊号LeuE12f1理

9、毋自0as2!jldLS：瑞LentlitclasslopLevelfEruc-ets-saxJLtrcdwi-tlnrcLujtiivalimc3E*reESaunypkeytocontinue.敢抖音半二2、 某出版系统发行图书和磁带，利用继承设计管理出版物的类。要求如下：建立一个基类Publication存储出版物的标题title、出版物名称name、单价price及出版日期date。用Book类和Tape类分别管理图书和磁带，它们都从Publication类派生。Book类具有保存图书页数的数据成员page,Tape类具有保存播放时间的数据成员playtime。每个类都有构造函数、析构

10、函数，且都有用于从键盘获取数据的成员函数inputData(),用于显示数据的成员函数display。3、#includeusingnamespacestd;#includeclassDatepublic:Date()Date(inty,intm,intd);Date(Date&d);voidSetDate(inty,intm,intd);voidShowDate();private:intyear,month,day;);Date:Date(inty,intm,intd)year=y;month=m;day=d;Date:Date(Date&d)year=d.year;month=d.mon

11、th;day=d.day;voidDate:SetDate(inty,intm,intd)year=y;month=m;day=d;voidDate:ShowDate()coutyear年month月day日endl;classTimepublic:Time()Time(inth,intm,ints);Time(Time&t);voidSetTime(inth,intm,ints);voidShowTime();private:inthour,minute,second;);Time:Time(inth,intm,ints)hour=h;minute=m;second=s;Time:Time(

12、Time&t)hour=t.hour;minute=t.minute;second=t.second;voidTime:SetTime(inth,intm,ints)hour=h;minute=m;second=s;voidTime:ShowTime()couthour:minute:secondendl;classPublicationpublic:Publication()Publication(stringtitle,stringname,floatprice,inty,intm,intd);voidinputData();voiddisplay();private:stringtitl

13、e;stringname;floatprice;Datedate;Publication:Publication(stringtitle,stringname,floatprice,inty,intm,intd):title(title),name(name),price(price),date(y,m,d)voidPublication:inputData()coutPleaseinputtitle,name,price,publicationdateofabook:titlenameprice;intyear,month,day;cinyearmonthday;date.SetDate(y

14、ear,month,day);)voidPublication:display()couttitle=titleendl;coutname=nameendl;coutprice=priceendl;coutpage=page;voidBook二inputData()Publication二inputData();coutPleasethepagesofthebook:page;voidBook:display()Publication:display();coutpage=pageendl;classTape:publicPublicationpublic:Tape()Tape(stringt

15、itle,stringname,floatprice,inty,intm,intd,Timeplaytime);voidinputData();voiddisplay();private:Timeplaytime;Tape:Tape(stringtitle,stringname,floatprice,inty,intm,intd,Timeplaytime):Publication(title,name,price,y,m,d),playtime(playtime)voidTape:inputData()Publication二inputData();coutPleasetheplaytimeo

16、fthetape:hourminutesecond;playtime.SetTime(hour,minute,second);voidTape:display()Publication:display();coutplaytime=;playtime.ShowTime();intmain()Bookbook1(教材,C+程序设计”,30.00,2009,6,1,300);book1.display();coutendl;Timetime1(30,10,20);Tapetape1(磁带”,C+程序设计视频”,10.00,2009,8,1,time1);tape1.display();Bookbo

17、ok2;book2.inputData();book2.display();coutendl;Tapetape2;tape2.inputData();tape2.display();return0;3.分别定义教师类Teacher和干部类Cadre,采用多重继承的方式由这两个类派生出新类Teacher_Cadre(教师兼干部类)。要求：(1)在两个基类中都包含姓名、年龄、性别、地址、电话数据成员。(2)在Teacher类中还包含数据成员职称title,在Cadre类中还包含数据成员职务post,在Teacher_Cadre类中还包含数据成员工资wage。(3)对两个基类中的姓名、年龄、性别、地

18、址、电话数据成员用相同的名字，在访问这类数据成员时，指定作用域。(4)在类体中声明成员函数，在类外定义成员函数。(5)在派生类Teacher_Cadre的成员函数show中调用Teacher类中的display函数，输出姓名、年龄、性别、地址、电话，然后再用cout语句输出职务和工资。4、#include#includeusingnamespacestd;classTeacherpublic:Teacher(stringnam,inta,chars,stringtit,stringad,stringt);voiddisplay();protected:stringname;intage;cha

19、rsex;stringtitle;stringaddr;stringtel;Teacher:Teacher(stringnam,inta,chars,stringtit,stringad,stringt):name(nam),age(a),sex(s),title(tit),addr(ad),tel(t)voidTeacher:display()coutageageendl;coutsex:sexendl;couttitle:titleendl;coutaddress:addrendl;couttel:telendl;)classCadrepublic:Cadre(stringnam,inta

20、,chars,stringp,stringad,stringt);voiddisplay();protected:stringname;intage;charsex;stringpost;stringaddr;stringtel;);Cadre:Cadre(stringnam,inta,chars,stringp,stringad,stringt):name(nam),age(a),sex(s),post(p),addr(ad),tel(t)voidCadre:display()coutname:nameendl;coutage:ageendl;coutsex:sexendl;coutpost

21、:postendl;coutaddress:addrendl;couttel:telendl;classTeacher_Cadre:publicTeacher,publicCadrepublic:Teacher_Cadre(stringnam,inta,chars,stringtit,stringp,stringad,stringt,floatw);voidshow();private:floatwage;Teacher_Cadre:Teacher_Cadre(stringnam,inta,chars,stringt,stringp,stringad,stringtel,floatw):Tea

22、cher(nam,a,s,t,ad,tel),Cadre(nam,a,s,p,ad,tel),wage(w)voidTeacher_Cadre:show()Teacher:display();coutpost:Cadre:postendl;)intmain()Teacher_Cadrete_ca(Wang-li,50,f,prof.,president,135BeijingRoad,Shanghai,(021)61234567,1534.5);te_ca.show();return0;)4.按下列要求编写程序。(1)定义一个分数类Score。它有3个数据成员：Chinese/语文课成绩Engl

23、ish/英语课成绩Mathematics/数学课成绩2个构造函数：无参的和带参数的3个成员函数：是否带参数根据需要自定sum()/计算三门课总成绩print()/输出三门课成绩和总成绩modify()修改三门课成绩(2)定义一个学生类Student。它有3个数据成员：Num/学号Name/姓名MyScore/成绩2个构造函数：无参的和带参数的3个成员函数：是否带参数根据需要自定sum()/计算某学生三门课总成绩print()/输出某学生学号、姓名和成绩modify()/修改某学生学号、姓名和成绩(3)在主函数中，先定义一个学生类对象数组，再通过for循环给对象数组赋上实际值,最后输出对象数组个

24、元素的值。5、#include#includeusingnamespacestd;classscore(public:score()(chinese=0;english=0;mathematics=0;)score(floatch,floaten,floatma):chinese(ch),english(en),mathematics(ma)floatsum();voidprint();voidmodify();private:floatchinese;floatenglish;floatmathematics;classstudentpublic:student():myscore(0,0,

25、0)(num=000000000;name=无；student(stringn,stringna,floatm,floatc,floate):num(n),name(na),myscore(m,c,e)floatsum();voidprint();voidmodify();private:stringnum;stringname;scoremyscore;);floatscore:sum()(return(chinese+english+mathematics);)voidscore:print()(cout语文chineseendl;cout英语englishendl;cout数学mathe

26、maticsendl;cout总成绩sum()endl;coutendlendlendl;)voidscore:modify()(cout请输入三门成绩endl;cinchinese;cinenglish;cinmathematics;coutendlendlendl;)floatstudent:sum()(return(myscore.sum();)voidstudent:print()(cout学号：numendl;cout姓名：nameendl;myscore.print();)voidstudent:modify()(cout请输入学号，姓名和成绩:num;cinname;myscor

27、e.modify();)intmain()(studentst3;cout请输入学生信息：endl;for(inti=0;i3;i+)(sti.modify();)for(inti=0;i请输入学号.姓名和成绫;L1小明清输入三门成绩7788请输入学号,姓名相庭责二L4，卜绿清输入三门成线E6776BXD:c+b(4)+exe5.编写一个程序实现小型公司的人员信息管理系统。该公司雇员(employee)包括经理(manager),技术人员(technician)、销售员(salesman)和销售部经理(salesmanager)。要求存储这些人员的姓名、编号、级别、当月薪水，计算月薪并显示全部

28、信息。程序要对所有人员有提升级别的功能。为简单起见，所有人员的初始级别均为1,然后进行升级，经理升为4级，技术人员和销售部经理升为3级，销售员仍为1级。月薪计算办法是：经理拿固定月薪8000元，技术人员按每小时100元领取月薪，销售员按该当月销售额4%提成，销售经理既拿固定月工资也领取销售提成，固定月工资为5000元，销售提成为所管辖部门当月销售额的5%0。#include#includeusingnamespacestd;classemployee/虚基类public:employee()coutID;coutname;salary=0;/月薪virtualvoidpay()=0;/月薪计算函数virtualvoidshow()=0;protected:stringname;/姓名intID;/职工编号doublesalary;/月薪)；classtechnician:virtualpublicemployee(public:technician()perhour=20;/每小时附加酬金voidpay()couthours;salary=perhour*hours;voidshow()cout技术人员name(编号为ID)本月工资:salaryendl;protected:doublehours;/月工作时数doubl