实验五：派生类和继承

1、实验五：派生类和继承（二）福建农林大学实验报告实验5派生类和继承（二）、实验目的和要求去，进一步理解类二、实验内容和原理1、试写出所能想到的所有形状（包括二维的和三维 的），生成一个形状层次类结构。生成的层次结构以Shape作为基类，并由此派生出 TwoDimShape类和 ThreeDimShape类。它们的派生类是不同形状类，定 义层次结构中的每一个类，并用函数main （）进行测试。2、设计一个学生类CStudent。数据成员包括学生姓名，性别，年龄，学号，已修学分。成员函数包括输 入输出或修改学生姓名、学号，增加已修学分。设计 一个教师类CTeacher。数据成员包括教师姓名，性 别，

2、年龄，职称，担任课程。成员函数包括输入输出 或修改教师姓名、年龄，更改职称等。以CStude nt为基类派生子类CGraduateStudent。增加数据成员 导师姓名、研究生已发表论文的数目；成员函数为增 加已发表论文数目。最后，用函数main （）函数进行测试。（提示：可为CStudent类和CTeacher类创建一个公共基类)三、实验环境1. 硬件：PC机；Visual C+ 6.02. 软件：Windows操作系统、四、算法描述及实验步骤#i nclude<iostream.h>const double Pl=3.14;class shapepublic:shape();d

3、ouble area()c on stretur n 0.0; double bulk()co nstreturn 0.0; ;class TwoDimShape:public shape;class Circle:public TwoDimShapepublic:Circle(double myr)R=myr;double area()c on streturn PI*R*R; protected:double R;class ThreeDimShape:public shape;class sphere:public ThreeDimShapepublic:sphere(double my

4、w)R=myw;double bulk()co nstreturn 4/3*PI*R*R*R; protected:double R;int mai n()shape sha;double area;double bulk;Circle c(3.0);area=c.area();cout<<"Area of circle is"<<area<<e ndl;sphere sph(4.0);bulk=sph.bulk(); cout«"Bulk of sphere is"<<bulk<<e

5、 ndl; return 0;2.#in clude<iostream>lude<string>g n amespace std; s Pers onublic:Pers on( stri ng n, stri ng s,i nt a)n ame=n; sex=s;age=a;void in put()cin>>"姓名:">>name;cin>>"性别:">>sex;cin>>"年龄:">>age;void display()cout

6、71;"姓名:"<<name«endl; coutvv"'性另H:"<<sex<<endl; cout«"年龄:"<<age<<endl;ected:stri ng n ame;stri ng sex;int age;s Teacher:virtual public Personic:Teacher(stri ng n, stri ng s,i nt a,stri ng t,stri ng l) :Pers on(n ,s,a)title=t;vo

7、id in put()Pers on:i nput();cin>>"职称:">>title;cin>>"担任课程:">>lesson;void display。Pers on:display。； protcout«"职称:"vvtitlevvendl; coutvv"担任课程:"vvlesson<<endl;ected: string title; stri ng less on;；clas public:s Stude nt:virtual p

8、ublic Pers onStude nt(stri ng n, stri ng s,i nt a, stri ng no ,stri ng c) :Pers on(n ,s,a)num=no;redit=c;oid in put()Pers on:i nput();cin>>"学号:">>num; cin>>"已修学分:">>credit;void display()Pers on:display。；cout«"学号:"<vnum<<endl; cout&#

9、171;"已修学分:"vvcreditvvendl;protected:stri ng num;stri ng credit;s Graduate:public Stude nt；claspublic:Graduate(stri ng n, stri ng s,i nt a,stri ng no ,stri ng c,stri ng tn, stri ng th) :Perso n(n ,s,a),Stude nt( n, s,a, no,c) tn ame=t n; thesis=th;void in put()Pers on:i nput(); cin>>&

10、quot;导师姓名:">>tname; cin>>"发表论文数目：">>thesis;void display()Stude nt:display();coutvv"导师姓名:"<<tnamevvendl; cout«"发表论文数目:"<<thesis<<endl;private:stri ng tn ame;stri ng thesis;int main()Teacher teac("镇镇","男",3

11、0,"博士","面向对象程序设计");Student stud("星星","女",19,"100202019","6");Graduate grad(" 杰杰","男",25,"100202021","18"," 源源","20"); cout«"教师有关数据:"<<endl;teac.display();cout&

12、lt;<"n 学生数据:"<<endl;stud.display();cout<<"n 研究生数据:"<<endl; grad.display();return 0;五、调试过程PI=3.14后面忘记加“；”号了retur nO.O 应该是 return 0.0protected 后面加的是：而不是;2.error C25Q1'string' : missing storage-class or type specifiersoerror C25 01'name' : n)i5si

13、ng storage-class or tijpe 5pecifiers訂error C21Ji6syntax error : missing '4 before identifier 'sex4error C25 01'string- : nissing starage-class or type specifiers刃error C2501'sex' : missing storage-clasG or type gpecitiers0)error C229unexpected 'class Teacher ('0)error C23

14、34unpMpectt0k0n(g) preceding ':1; skipping apparent func打ef*r<jr C2i46syntam error : niisingbefore identlFier 1 title 1error C25B1'string': nissing storage-class or type specifiers?)errr C25 01'title' ; niiny tordge-cl55 or type specifiersa)error C21-46syntax error : missing &

15、#39;* before identifier 'lesson'町error C25 01'string- : missing storage-class or type specifiers0Jerror C25 01'lesson' :storage-class or type specifiers5)error C2«29unexpected 'class Student C'5)error C233J*unexpected takn(s) preceding ':1; skipping apparent func刃error C2146syntdx error : misirig - ;* before identifier 'num*error C25B1'string' : ni