Consider the following class declaration. This is the continuation of the lab 8, exercise 1. Suppose that management now wants to change the customer management system so that the credit limit applies to the unpaid balance on the account. A new purchase will be disallowed when it would cause the unpaid balance to exceed the credit limit. You'll need to declare or modify data members, constructors, accessors, and mutators to expand the Customer class from LAB 8 Exercise 1 to return a value specifying that a new purchase would exceed the credit limit. This can be calculated by passing the purchase price into a member function, adding this to the unpaid balance, and comparing it to the credit line. Enhance your Customer class to fulfill the new requirements. Write a program that tests the new feature. Insert print statements into your code to provide a trace of your program’s execution of a series of sales.. Use the filename customer. h, customer. cpp and customerDemo. cpp for your programs (5 points)

Explanation:

The code is implemented in C++ and comments to aid understanding are provided below.

Will be attaching code for these 3 files:

CustomerDemo.cpp

Customer.cpp

Customer.h

Source code for CustomerDemo.cpp:

#include <iostream>

#include "Customer.h"

using namespace std;

int main()

{

string response = "y";

double val;

Customer a("John Doe", "101 Main St.", "Rockford", "IL", "61801", 100.00);

Customer b("J", "101 Main St.", "Rockford", "IL", "61801", 100.00);

Customer c("Doe", "101 Main St.", "Rockford", "IL", "61801", 100.00);

Customer z("D", "101 Main St.", "Rockford", "IL", "61801", 100.00);

while ( response == "y" )

{

cout << "Purchase value (in $): ";

cin >> val;

if(!c.add_purchase(val)) break;;

cout << "Do you want to purchase another item (y/n)? ";

cin >> response;

}

cout << "Please pay the balance of $" << c.get_unpaid_balance() << endl;

/* cout << "would you like to pay off part of the unpaid balance?" <<endl;

if (response== "y")

{

cout< "Enter the payment amoun (in $)";

(c.get_

cout << "Do you want to purchase another item (y/n)? ";

cin >> response;

}*/

system("pause");

return 0;

}

→ Source code for Customer.cpp:

#include "Customer.h"

Customer::Customer()

{

name = "";

address = "";

city = "";

state = "";

zipcode = "";

credit_limit = 0;

year_to_date_purchases = 0;

unpaid_balance = 0;

}

Customer::Customer(string n, string a, string c, string s, string z, double cl)

{

name = n;

address = a;

city = c;

state = s;

zipcode = z;

credit_limit = cl;

year_to_date_purchases = 0;

unpaid_balance = 0;

}

void Customer::increase_limit(double amount)

{

credit_limit += amount;

}

string Customer::get_name() const

{

return name;

}

string Customer::get_address() const

{

return address;

}

string Customer::get_city() const

{

return city;

}

string Customer::get_state() const

{

return state;

}

string Customer::get_zipcode() const

{

return zipcode;

}

double Customer::get_credit_limit() const

{

return credit_limit;

}

double Customer::get_unpaid_balance() const

{

return unpaid_balance;

}

bool Customer::add_purchase(double val)

{

if ( (val + unpaid_balance) > credit_limit )

{

cout << "Not enough credit limit. Purchase cannot be completed.\n";

return false;

}

year_to_date_purchases += val;

unpaid_balance += val;

cout << "Purchase successful.\n"; //trace message

return true;

}

void Customer::pay_balance(double payment)

{

unpaid_balance -= payment;

}

→  Source code for Customer.h:

#ifndef CUSTOMER_H

#define CUSTOMER_H

#include <string>

#include <vector>

#include <iostream>

using namespace std;

class Customer

{

public:

//constructors    

Customer();

Customer(string name, string address, string city,

string state, string zipcode, double);

//accessors    

string get_name() const;

string get_address() const;

string get_city() const;

string get_state() const;

string get_zipcode() const;

double get_credit_limit() const;

double get_unpaid_balance() const;

//mutators

void increase_limit(double amount);

bool add_purchase(double val);

void pay_balance(double payment);

private:

string name;

string address;

string city;

string state;

string zipcode;

double credit_limit;

double year_to_date_purchases;

double unpaid_balance;

};

#endif

cheers i hope this helped !!