C++继承题，要代码ballball了

Question

创建一个名为Person的类，该类包含以下数据：Lastname、Eirstname、Address、City、State、Zip、Phone

创建第二个名为Customer的类，该类继承Person并包含以下数据：

o可以设置的唯一字符串值。如果在创建客户时未提供，则应自动生成。）

o电子邮件地址

List（一个布尔变量，指示它们是否是邮件列表的成员）

所有的顾客都是人，但人不一定是顾客。

为这两个类编写所有适当的构造函数、访问器和mutator函数。

所有类都必须有一个空构造函数、各种各样的构造函数排列（根据需要）以及任何必要的析构函数。

创建一个名为Customer的文本文件。txt，文件的每一行都包含

个人客户的信息。各个字段应该用逗号分隔，并且您应该用至少20条记录填充文档。

使用文件流从文件中读取数据，将每行的数据存储到Customer类的单个实例中。

存储在动态分配的数组中创建的客户类的每个实例。换句话说，您应该有一个动态分配的数组，其中包含Customer类的所有实例。客户中的每一行数据都应该有一个客户类实例。txt文件。

将数组传递给函数，以便在格式良好的表中打印出所有客户信息。

Answer 1

Customer.txt内容如下

1000000001,1,Zhang,San,Xingfudajie 4-21,New York,Youta,aaa,123456789
1000000002,1,Zhou,San,Xingfudajie 5-21,New York,Youta,aaa,223456789
1000000003,1,Wu,San,Xingfudajie 6-21,New York,Youta,aaa,323456789
1000000004,1,Zheng,San,Xingfudajie 7-21,New York,Youta,aaa,423456789
1000000005,1,Wang,San,Xingfudajie 8-21,New York,Youta,aaa,523456789
1000000006,1,Liu,San,Xingfudajie 4-44,New York,Youta,aaa,623456789
1000000007,1,Tang,San,Xingfudajie 4-23,New York,Youta,aaa,723456789
1000000008,1,Han,San,Xingfudajie 4-18,New York,Youta,aaa,823456789
1000000009,1,Dong,San,Xingfudajie 3-22,New York,Youta,aaa,923456789
1000000010,1,Gao,Yi,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000011,1,Gao,Yang,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000012,1,Gao,Hao,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000013,1,Gao,Tian,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000014,1,Gao,Xiang,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000015,1,Gao,Mei,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000016,1,Gao,Li,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000017,1,Gao,Huan,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000018,1,Gao,Juan,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000019,1,Gao,Ya,Xingfudajie 7-21,New York,Youta,aaa,103456789
1000000020,1,Gao,Song,Xingfudajie 7-21,New York,Youta,aaa,103456789

代码如下：

#include <iostream>
#include <string>
#include <fstream>
#include <time.h>
using namespace std;

class People
{
private:
    string Lastname;
    string Firstname;
    string Address;
    string City;
    string State;
    string Zip;
    string Phone;
public:
    People(){}
    People(string ln,string fn,string addr, string ct,string state,string zip,string phone)
    {
        Lastname = ln;
        Firstname = fn;
        Address = addr;
        City = ct;
        State = state;
        Zip = zip;
        Phone = phone;
    }
    ~People(){}
    //setter
    void setLastName(string ln){Lastname = ln;}
    void setFirstName(string fn){Firstname = fn;}
    void setAddress(string a){Address = a;}
    void setCity(string ct){City = ct;}
    void setState(string st){State = st;}
    void setZip(string zip){Zip = zip;}
    void setPhone(string ph){Phone = ph;}

    //getter
    string getLastName(){return Lastname;}
    string getFirstName(){return Firstname;}
    string getAddress(){return Address;}
    string getCity(){return City;}
    string getState(){return State;}
    string getZip(){return Zip;}
    string getPhone(){return Phone;}
};

class Customer : public People
{
private:
    string CustomerNmb;
    bool MailList;
public:
    Customer(){}
    Customer(string ln,string fn,string addr, string ct,string state,string zip,string phone,string nmb,bool b):People(ln,fn,addr,ct,state,zip,phone)
    {
        CustomerNmb = nmb;
        MailList = b;
    }
    ~Customer(){}
    //setter
    void setCustomNmb(string nmb){CustomerNmb = nmb;}
    void setMailList(bool b){MailList = b;}
    //getter
    string getCustomNmb()
    {
        if (CustomerNmb.empty())
        {
            //自动生成一个Custom Number
            char buf[11]={0};
            srand((unsigned int)time(0));
            for (int i = 0;i<10;i++)
            {
                buf[i] = '0'+ rand()%10;
            }
            CustomerNmb = buf;
        }
        return CustomerNmb;
    }
    bool getMailist(){return MailList;}

    friend istream & operator>>(istream &is,Customer &c)
    {
        char buf[200] = {0};
        is.getline(buf,200);//读入一行数据
        string s = buf;
        int startpos = s.find(",",0);
        if(startpos < 0) return is;
        //第一个元素Custom nmb
        c.setCustomNmb(s.substr(0,startpos));

        //第二个元素是否在列表中
        int endpos = s.find(",",startpos+1);
        if(endpos < 0) return is;
        startpos +=1;
        string blist = s.substr(startpos,endpos - startpos);
        startpos = endpos;
        if (blist.compare("1")==0)
            c.setMailList(true);
        else
            c.setMailList(false);

        //第三个元素Lastname
        endpos = s.find(",",startpos+1);
        if(endpos < 0) return is;
        startpos +=1;
        c.setLastName(s.substr(startpos,endpos - startpos));
        startpos = endpos;

        //第四个元素
        endpos = s.find(",",startpos+1);
        if(endpos < 0) return is;
        startpos +=1;
        c.setFirstName(s.substr(startpos,endpos - startpos));
        startpos = endpos;

        //第五个元素address
        endpos = s.find(",",startpos+1);
        if(endpos < 0) return is;
        startpos +=1;
        c.setAddress(s.substr(startpos,endpos - startpos));
        startpos = endpos;

        //第六个元素city
        endpos = s.find(",",startpos+1);
        if(endpos < 0) return is;
        startpos +=1;
        c.setCity(s.substr(startpos,endpos - startpos));
        startpos = endpos;

        //第七个元素state
        endpos = s.find(",",startpos+1);
        if(endpos < 0) return is;
        c.setState( s.substr(startpos,endpos - startpos));
        startpos = endpos;

        //第八个元素zip
        endpos = s.find(",",startpos+1);
        if(endpos < 0) return is;
        startpos +=1;
        c.setZip(s.substr(startpos,endpos - startpos));
        startpos = endpos;
        
        //第9个元素phone
        startpos +=1;
        endpos = s.length();
        if(endpos < 0) return is;
        c.setPhone(s.substr(startpos,endpos - startpos));

        return is;
    }

    void display()
    {
        cout << CustomerNmb << "," << MailList << "," << getLastName() <<","<<getFirstName()<< ",";
        cout << getAddress()<<"," << getCity() << "," << getState()<<"," << getZip() << "," << getPhone() << endl; 
    }
};
//读文件
Customer* ReadFile(const char* name,int &nmb)
{
    int size= 40;
    nmb = 0;
    Customer* a = new Customer[size]; //申请40个空间
    ifstream is(name);
    if (!is.is_open())
    {
        cout << "文件打开失败" << endl;
        return 0;
    }
    while(!is.eof())
    {
        Customer cus;
        is >> cus;
        if(nmb >= size)
        {
            size = size * 2;
            Customer* pt = new Customer[size];
            for (int i=0;i< nmb;i++)
            {
                pt[i] = a[i];
            }
            delete[] a;
            a = pt;
        }
        a[nmb++] = cus;
    }
    is.close();
    return a;
}



int main()
{
    int nmb = 0;
    Customer* pp = 0;
    pp = ReadFile("Customer.txt",nmb);  //读取文件
    for (int i = 0; i< nmb;i++)
    {
        pp[i].display();
    }

    delete[] pp;
    pp = 0;
    system("pause");
    return 0;
}