模拟网上购书的结帐功能-项目说明书2

1、面向对象程序设计基础项目设计说明书项 目：模拟网上购书的结账系统专 业： 软件工程 班 级： 16 级 1 班 学 号： 16044115 姓 名： 李泽 哈尔滨学院·信息工程学院一、功能要求模拟实现网上购书的结账功能。使用C+，实现图书信息的输入、输出，购书人信息的输出、购书账单的结算、保存等功能。二、设计要求1设计类。包含：（1）定义基类buyer，其中含有数据成员：姓名、购书人编号、地址等。（2）定义基类buyer的派生类：普通人、会员、贵宾。要求会员类增加数据成员会员级别，贵宾类增加数据成员折扣率。（3）定义书类book，其中含有数据成员：书号、书名、作者、定价等。2. 系统

2、实现以下相应的各项功能：（1）图书信息的输入、输出；（2）购书人信息的输出；（3）购书账单的结算；（4）购书信息的保存。3其它要求：（1）使用构造函数、析构函数和成员函数；（2）使用友元、继承；（3）使用文件保存；（4）使用适当的注释进行说明；（5）允许适当地增加其它功能。三、全部的程序源代码（有相应注释）/buy.hclass buyerprotected:string name;int buyerID;string address;double pay;public:buyer();buyer(string n,int b,string a,double p);string getbuyn

3、ame();string getaddress();double getpay();int getid();virtual void display()=0;virtual void setpay(double=0)=0;class member:public buyerint leaguer_grade;public:member(string n,int b,int l,string a,double p):buyer(n,b,a,p)leaguer_grade=l;void display();void setpay(double p);class honoured_guest:publ

4、ic buyerdouble discount_rate;public:honoured_guest(string n,int b,double r,string a,double p):buyer(n,b,a,p)discount_rate=r;void display();void setpay(double p);class layfolk:public buyerpublic:layfolk(string n,int b,string a,double p):buyer(n,b,a,p)void display();void setpay(double p);buyer:buyer()

5、name=""buyerID=0;address=" "pay=0; buyer:buyer(string n,int b,string a,double p)name=n;buyerID=b;address=a;pay=p; double buyer:getpay()return pay;string buyer:getaddress()return address;string buyer:getbuyname()return name;int buyer:getid()return buyerID;/void member:display()cou

6、t<<"购书人姓名："<<name<<"t"cout<<"购书人编号："<<buyerID<<"t"cout<<"购书人为会员，级别："<<leaguer_grade<<"n"cout<<"购书地址："<<address<<"n"/void member:setpay(double p)if(l

7、eaguer_grade=1) pay=.95*p+pay;else if(leaguer_grade=2) pay=.90*p+pay;else if(leaguer_grade=3) pay=.85*p+pay;else if(leaguer_grade=4) pay=.8*p+pay;else if(leaguer_grade=5) pay=.7*p+pay;else cout<<"级别错误！"/void member:display()void honoured_guest:display()cout<<"购书人姓名："&

8、lt;<name<<"t"cout<<"购书人编号："<<buyerID<<"t"cout<<"购书人为贵宾，折扣率为："<<discount_rate*100<<"%n"cout<<"购书地址："<<address<<"n"void honoured_guest:setpay(double p)pay=pay+(1-discoun

9、t_rate)*p;void layfolk:display()cout<<"购书人姓名："<<name<<"t"cout<<"购书人编号："<<buyerID<<"t"cout<<"购书人为普通人："<<"n"cout<<"购书地址："<<address<<"n"void layfolk:setpay(d

10、ouble p)pay=pay+p;/book.hclass bookprotected:string book_ID;string book_name;string author;string publishing;double price;public:book()book_ID=""book_name=""author=""publishing=""price=0;book(string b_id,string b_n,string au,string pu,double pr)book_ID=b_id;bo

11、ok_name=b_n;author=au;publishing=pu;price=pr;void display()cout<<"书号:"<<book_ID<<"t"cout<<"书名:"<<book_name<<"t"cout<<"作者:"<<author<<"n"cout<<"出版社:"<<publishing<&

12、lt;"t"cout<<"定价:"<<price<<"n"string getbook_ID()return book_ID;string getbook_name()return book_name;string getauthor()return author;string getpublishing()return publishing;double getprice()return price;/strclass.h#include"string.h"class stri

13、ngfriend ostream& operator<<(ostream& S,const string& Str);friend istream& operator>>(istream& S,string& Str);public:string();string(const string& Str);void operator=(const string& Str);string();string(char *p);private:short m_Length;char*m_Date;string:str

14、ing()m_Length=1;m_Date=new char m_Length;memcpy(m_DATE,"",m_Length);string:string(const string& Str)m_Length=Str.m_Length; m_Date=new char m_Length;memcpy(m_Date,Str.m_Date,m_Length);string:string(char*p) m_Length=strlen(p)+1;m_Date=new char m_Length;memcpy(m_Date,p,m_Length);void stri

15、ng:operator =(const string& Str)if(&Str!=this)delete m_Date;m_Length=Str.m_Length;m_Date=new char m_Length; memcpy(m_Date,Str.m_Date,m_Length);return;string:string()deletem_Date;ostream& operator<<(ostream& S,const string& Str)short i;for(i=1;i<Str.m_Length-1;i+)S<<

16、;Str.m_Datei;return S;istream& operator>>(istream& S,string& Str)const short BUFLEN=256;char BufBUFLEN;memset(Buf,0,BUFLEN);if(S.peek()='n')S.ignore();S.getline(Buf,BUFLEN,'n'); Str=Buf;return S;/buy_book.cpp#include<string>#include<iostream>using namesp

17、ace std;#include"buy.h"#include"book.h"class order public: order() buyerID=0; ordercount+; orderID=ordercount; listcount=0; void setbuyid(int b_id) buyerID=b_id; void buy_one_book(string b_id) orderlistlistcount=b_id; listcount+; void display(); private: static int ordercount; in

18、t orderID; int buyerID; int listcount; string orderlist20;void order:display() int i; cout<<"n订单信息nn订单号："<<orderID<<"t" cout<<"购书人编号："<<buyerID<<"n" cout<<"所购图书书号：" for(i=0;i<listcount;i+) cout<<orde

19、rlisti<<"t" cout<<endl;int order:ordercount=0;void main()int i=0,j=0;int buyerid,flag;book *c2; /用指针数组存放book对象的地址layfolk b1("林小茶",1,"北京",0);honoured_guest b2("王遥遥",2,.6,"上海",0);member b3("赵红艳",3,5,"广州",0);order o120;buyer *b3=&b1,&b2,&b3; /用指针数组存放继承了buyer类的3个对象的地址book c1("7-302-040504-6","c+程序设计","谭浩强","清华",25);book c2("7-402-03388-9","数据结构","许卓群","北大",20);c0=&c1;c1=&c