Modify the Employer class to serve as a base class.

Create child classes from the Employer class for three types of employers:

Sales,

Service, and

Manufacturing.

Modify the program to use each child class based on a choice of employer type during data input.

Ensure that the program will output properly when all three types of child classes are active after input.

//Employer.h

#ifndef EMPLOYER_INCLUDE

#define EMPLOYER_INCLUDE

class Employer

{

public:

long ph;

char name[20];

void input_data();

void show_data();

long get_phone();

char* get_name();

};

#endif

//Employer.cpp

#include

#include "Employer.h"

using namespace std;

void Employer::input_data()

{

cout << "Phone: ";

cin >> ph;

cout << "Name: ";

cin.ignore();

cin >> name;

}

void Employer::show_data()

{

cout << endl

<< "Phone number: " << ph;

cout << endl

<< "Name: " << name;

}

long Employer::get_phone()

{

return ph;

}

char* Employer::get_name()

{

return name;

}

//PersonalInfo.h

#ifndef PERSONINFO_INCLUDE

#define PERSONINFO_INCLUDE

class PersonalInfo

{

public:

char add[20];

char email[20];

void input_data();

void show_data();

char* get_add();

char* get_email();

};

#endif

//PersonalInfo.cpp

#include

#include "PersonalInfo.h"

using namespace std;

void PersonalInfo::input_data()

{

cout << "Address: ";

cin.ignore();

cin >> add;

cout << "Email address: ";

cin.ignore();

cin >> email;

cout << " ";

}

void PersonalInfo::show_data()

{

cout << endl

<< "Address: " << add;

cout << endl

<< "Email Address : " << email;

}

char* PersonalInfo::get_add()

{

return add;

}

char* PersonalInfo::get_email()

{

return email;

}

//Person.h

#ifndef PERSON_INCLUDE

#define PERSON_INCLUDE

#include "Employer.h"

#include "PersonalInfo.h"

class Person

{

public:

Employer EInfo;

PersonalInfo PInfo;

void create();

void show_person();

long get_phone();

void operator=(Person p);

char* get_name();

char* get_add();

char* get_email();

};

#endif

//Person.cpp

#include

#include

#include

#include

#include

#include

#include

#include

#include "Person.h"

#include "Employer.h"

#include "PersonalInfo.h"

using namespace std;

void Person::create()

{

EInfo.input_data();

PInfo.input_data();

}

void Person::show_person()

{

EInfo.show_data();

PInfo.show_data();

}

void Person::operator=(Person a)

{

EInfo.ph = a.get_phone();

strcpy(EInfo.name, a.get_name());

strcpy(PInfo.add, a.get_add());

strcpy(PInfo.email, a.get_email());

}

long Person::get_phone()

{

return EInfo.get_phone();

}

char* Person::get_name()

{

return EInfo.get_name();

}

char* Person::get_add()

{

return PInfo.get_add();

}

char* Person::get_email()

{

return PInfo.get_email();

}

fstream fp;

Person per;

void write_persons(vector &data)

{

fp.open("contactBook.dat", ios::out);

per.create();

for (int i = 0; i < data.size(); i++)

{

fp.write((char *)&data[i], sizeof(Person));

}

fp.close();

cout << endl

<< endl

<< "Customers have been saved to file!";

getchar();

}

void show_all_person(vector &data)

{

cout << " \t\t-------------------------------- \t\t\tLIST OF CUSTOMERS \t\t-------------------------------- ";

for (int i = 0; i < data.size(); i++)

{

data[i].show_person();

cout << endl

<< "----------------------------------------------- "

<< endl;

}

}

void show_all_person()

{

//system("clear");

cout << " \t\t-------------------------------- \t\t\tLIST OF CUSTOMERS \t\t-------------------------------- ";

fp.open("contactBook.dat", ios::in);

while (fp.read((char *)&per, sizeof(Person)))

{

per.show_person();

cout << endl

<< "----------------------------------------------- "

<< endl;

}

fp.close();

}

void display_Person(long num)

{

bool found;

int ch;

found = false;

fp.open("contactBook.dat", ios::in);

while (fp.read((char *)&per, sizeof(Person)))

{

if (per.get_phone() == num)

{

system("clear");

per.show_person();

found = true;

}

}

fp.close();

if (found == false)

{

cout << " No results found. Please try again.";

}

getchar();

}

void display_Person(vector &data, long x)

{

for (int i = 0; i < data.size(); i++)

{

if (data[i].get_phone() == x)

{

system("clear");

data[i].show_person();

return;

}

}

cout << " No results found. Please try again. ";

}

void edit_person(vector &data)

{

system("clear");

long num;

cout << "Edit customer ------------------------------- \tEnter the number of the customer that you wish to change:";

cin >> num;

for (int i = 0; i < data.size(); i++)

{

if (data[i].get_phone() == num)

{

data[i].show_person();

cout << " Please enter the new customer information: " << endl;

data[i].create();

cout << endl

<< endl

<< "\t Customer has been changed!";

return;

}

cout << " No results found. Please try again. ";

}

}

//Edit the customer information to update/correct information

void edit_person()

{

long num;

bool found = false;

system("clear");

cout << "Edit customer ------------------------------- \tEnter the number of the customer that you wish to change:";

cin >> num;

fp.open("contactBook.dat", ios::in | ios::out);

while (fp.read((char *)&per, sizeof(Person)) && found == false)

{

if (per.get_phone() == num)

{

per.show_person();

cout << " Please enter the new customer information: " << endl;

per.create();

int pos = -1 * sizeof(per);

fp.seekp(pos, ios::cur);

fp.write((char *)&per, sizeof(per));

cout << endl

<< endl

<< "\t Customer has been changed!";

found = true;

}

}

fp.close();

if (found == false)

cout << endl

<< endl

<< "Customer not found. Please try again.";

}

void delete_person(vector &data)

{

long num;

system("clear");

cout << endl

<< endl

<< "Please enter the customers number: ";

cin >> num;

for (int i = 0; i < data.size(); i++)

{

if (data[i].get_phone() == num)

{

for (int j = i + 1; j < data.size(); j++)

{

data[j - 1] = data[j];

}

cout << endl

<< endl

<< "\tCustomer Deleted.";

return;

}

}

cout << endl

<< endl

<< "Customer not found. Please try again.";

}

//Delete a customer from the array

void delete_person()

{

long num;

system("clear");

cout << endl

<< endl

<< "Please enter the customers number: ";

cin >> num;

fp.open("contactBook.dat", ios::in | ios::out);

fstream fp2;

fp2.open("Temp.dat", ios::out);

fp.seekg(0, ios::beg);

while (fp.read((char *)&per, sizeof(Person)))

{

if (per.get_phone() != num)

{

fp2.write((char *)&per, sizeof(Person));

}

}

fp2.close();

fp.close();

remove("contactBook.dat");

rename("Temp.dat", "contactBook.dat");

cout << endl

<< endl

<< "\tCustomer Deleted.";

}

void read_person(vector &data)

{

fp.open("contactBook.dat", ios::in);

if (!fp)

{

cout << "Error opening file ";

return;

}

int count = 0;

Person per;

while (fp.read((char *)&per, sizeof(Person)))

data.push_back(per);

}

void add_person(vector &data)

{

Person per;

per.create();

data.push_back(per);

cout << endl

<< endl

<< "Customers has been added!";

}

//Main module for the menu

int main(int argc, char *argv[])

{

vector data;

cout << "\t\t\t\t-\t-";

cout << "\t\t\t\t--\t--";

cout << "\t\t\t\t---\t---";

cout << "\t\t\t\t----\t----";

cout << "\t\t\t\t-----\t-----";

cout << "\t\t\t\t------\t------";

cout << "\t\t\t\t-------\t-------";

cout << "\t\t\t\t------\t-------";

cout << "\t\t\t\t------\t------";

cout << "\t\t\t\t-----\t-----";

cout << "\t\t\t\t----\t----";

cout << "\t\t\t\t---\t---";

cout << "\t\t\t\t--\t--";

cout << "\t\t\t\t-\t-";

read_person(data);

for (;;)

{

int ch;

cout << " \t ---- Welcome to the Contact Management System ----";

cout << " \t\t\tMAIN MENU \t\t---------------------- \t\t[1] Add a new customer \t\t[2] List all customers \t\t[3] Search for a customer \t\t[4] Edit a customer \t\t[5] Delete a customer \t\t[0] Exit \t\t------------------ \t\t";

cout << "Enter your choice:";

cin >> ch;

switch (ch)

{

case 0:

cout << " \t\tHave a great day!";

write_persons(data);

exit(0);

break;

break;

break;

case 1:

add_person(data);

break;

case 2:

show_all_person(data);

break;

case 3:

long num;

system("clear");

cout << " \tPhone: ";

cin >> num;

display_Person(data, num);

break;

case 4:

edit_person(data);

break;

case 5:

delete_person(data);

break;

default:

break;

}

int opt;

cout << " Enter your choice: \t[1] Main Menu\t\t[0] Exit ";

cin >> opt;

switch (opt)

{

case 1:

system("clear");

continue;

case 0:

write_persons(data);

exit(0);

}

}

return 0;

}