Homework Answers
Note:
1. The point k in the requirements has some error, as a car can not be a customer, so it has been assumed that the requirement is to tell the type of the customer which has rented a particular car.
2. Only the address fields have been considered to be containing spaces, rest of the input values must not have spaces.
Code to Copy:
//Remove the stdafx.h header file
//if not using visual studio.
#include "stdafx.h"
//Include the required
//header files.
#include <iostream>
#include <string>
//Use the standard namespace.
using namespace std;
//Define the
//class Car.
class Car
{
//Declare the
//required variables.
string type;
int id_no;
int avail;
//Define the required
//public members.
public:
//Define the
//default constructor.
Car()
{
int x;
cout << "Enter the type of the car" << endl
<< "1.Standard"
<< endl << "2.Luxury" << endl;
cin >> x;
while (x < 1 || x>2)
{
cout << "Please enter a valid choice(1/2): " << endl;
cin >> x;
}
if (x == 1)
{
type = "Standard";
}
else
{
type = "Luxury";
}
cout << "Enter the id_no of the car: ";
cin >> id_no;
avail = 1;
}
string get_type()
{
return type;
}
int get_id()
{
return id_no;
}
//Define the
//method() get_avail().
int get_avail()
{
return avail;
}
void set_avail(int x)
{
avail = x;
}
};
//Define the class Customer.
class Customer
{
//Declare the
//required private members.
int cno;
string name;
string address;
string tel_no;
string cust_type;
int days;
int rent;
int r_car_id;
//Define the required
//public members.
public:
Customer()
{
}
//Define the parametrized constructor.
Customer(string temp_cust_type)
{
cout << "Enter the customer number: ";
cin >> cno;
cout << "Enter the address of the customer: ";
getline(cin, address);
cin.ignore(256, '\n');
cout << "Enter the tel_no of the customer: ";
cin >> tel_no;
cust_type = temp_cust_type;
days = 0;
rent = 0;
r_car_id = -1;
}
//Define the getter functions.
int get_cno()
{
return cno;
}
void set_rent_id(int z)
{
r_car_id = z;
}
int get_rent_id()
{
return r_car_id;
}
void set_rent(int x)
{
rent = x;
}
void set_days(int y)
{
days = y;
}
int get_rent()
{
return rent;
}
string get_type()
{
return cust_type;
}
//Define a virtual function cname()
// to be used in corporate
//class only.
virtual string getcname()
{
return "nothing";
}
};
//Define the class
//representing regular customers.
class reg_customer :public Customer
{
public:
reg_customer() :Customer("Regular")
{
}
};
//Define the class
//representing corporate customers.
class cor_cust :public Customer
{
string c_name;
string c_address;
public:
cor_cust() :Customer("Corporate")
{
cout << "Enter the name of the customer's company: ";
cin >> c_name;
cout << "Enter the address of the customer's company: ";
getline(cin, c_address);
cin.ignore(256, '\n');
}
string getcname()
{
return c_name;
}
};
//Define the class
//representing VIP customers.
class vip_customer :public Customer
{
public:
vip_customer() :Customer("VIP")
{
}
};
//Define the class CarRentalManagement.
class CarRentalManagement
{
//Define tan array
//of pointers of
//the Car class.
Car *inventory[100];
//Decalare a variable to store
//the total number of cars
//in the inventory.
int no_cars;
//Define an array of pointers
//of Customer type so that any
//type of customer can be
//stored in it.
Customer *list[100];
//Declare the variable to store
//the total number of customers
//in the list.
int no_cust;
//Declare the variable to store
//the privilleges of different
//types of customers.
int reg_days;
int cor_days;
int vip_days;
public:
CarRentalManagement()
{
no_cars = 0;
no_cust = 0;
reg_days = 25;
cor_days = 35;
vip_days = 45;
//Initialize the pointers
//to NULL to avoid memory
//access violations.
for (int i = 0; i < 100; i++)
{
inventory[i] = NULL;
list[i] = NULL;
}
}
void display()
{
char ch;
cout << endl << "Please choose one of the following options:\n" << endl;
cout << "a) Add a new car to the inventory"
<< endl << "b) Remove an existing car from the inventory"
<< endl << "c) Register new customers"
<< endl << "d) Remove a given customer from the customer's list"
<< endl << "e) Rent a car to a customer"
<< endl << "f) Return a car and update car information"
<< endl << "g) Return the privileges of a particular customer"
<< endl << "h) Change the privileges"
<< endl << "i) Determine whether a given car is rented or not "
<< endl << "j) Determine whether a given customer has rented a car"
<< endl << "k) Determine whether a given car is"
<< " a rented by a regular customer, corporate, or VIP "
<< endl << "l) Determine the types of cars"
<< " rented by a customer of a given company";
cout << endl << "m) Exit" << endl;
cin >> ch;
process_choice(ch);
}
void process_choice(char ch)
{
switch (ch)
{
case 'a':
inventory[no_cars++] = new Car();
break;
case 'b':
remove_car();
break;
case 'c':
add_customer();
break;
case 'd':
rem_cust();
break;
case 'e':
rent_car();
break;
case 'f':
int cid;
cout << "Enter the id of the customer: ";
cin >> cid;
for (int i = 0; i<no_cust; i++)
{
if (list[i]->get_cno() == cid)
{
if (list[i]->get_rent() == 1)
{
list[i]->set_rent(0);
}
else
{
cout << "This customer has not rented car.";
break;
}
for (int k = 0; k<no_cars; k++)
{
if (inventory[k]->get_id() == list[i]->get_rent_id())
{
inventory[k]->set_avail(1);
break;
}
}
list[i]->set_rent_id(0);
break;
}
}
break;
case 'g':
int x;
cout << "Enter the id of the customer: ";
cin >> x;
for (int i = 0; i<no_cust; i++)
{
if (list[i]->get_cno() == x)
{
privileges(list[i]->get_type());
break;
}
}
break;
case 'h':
change_priveleges();
break;
case 'i':
check_car();
break;
case 'j':
check_cust();
break;
case 'k':
find_car();
break;
case 'l':
find_comp();
break;
case 'm':
cout << "Now Exiting..." << endl;
return;
default:
cout << "Please enter a valid choice." << endl;
}
display();
}
void find_comp()
{
string comp;
cout << "Enter the name of the company to be checked: ";
cin >> comp;
for (int i = 0; i<no_cust; i++)
{
if (list[i]->get_type() == "Corporate")
{
if (list[i]->getcname() == comp && list[i]->get_rent() == 1)
{
for (int k = 0; k<no_cars; k++)
{
if (inventory[k]->get_id() == list[i]->get_rent_id())
{
cout << inventory[k]->get_type() << endl;
}
}
}
}
}
}
void find_car()
{
int id;
cout << "Enter the id of the car to be checked: ";
cin >> id;
for (int i = 0; i<no_cust; i++)
{
if (list[i]->get_rent_id() == id)
{
cout << "The car has been rented by a "
<< list[i]->get_type() << " customer." << endl;
return;
}
}
cout << "A car with given id has not been rented by any customer." << endl;
}
void check_car()
{
int cid;
cout << "Enter the id of the car to be checked: ";
cin >> cid;
for (int i = 0; i<no_cars; i++)
{
if (inventory[i]->get_id() == cid)
{
if (inventory[i]->get_avail())
{
cout << "The car is not on rent." << endl;
}
else
{
cout << "The car is on rent." << endl;
}
return;
}
}
cout << "The car id is not found." << endl;
}
void check_cust()
{
int cid;
cout << "Enter the id of the customer to be checked: ";
cin >> cid;
for (int i = 0; i<no_cust; i++)
{
if (list[i]->get_cno() == cid)
{
if (list[i]->get_rent())
{
cout << "The customer has rented a car." << endl;
}
else
{
cout << "The customer has not rented a car." << endl;
}
return;
}
}
cout << "The customer id is not found.";
}
void privileges(string x)
{
if (x == "Regular")
{
cout << "Number of days car can be rented = "
<< reg_days << endl;
}
else if (x == "Corporate")
{
cout << "Number of days car can be rented = "
<< cor_days << endl;
}
else
{
cout << "Number of days car can be rented = "
<< vip_days << endl;
}
}
void change_priveleges()
{
int ch;
cout << "Enter the type of the customer to be changed: " << endl;
cout << "1-> Regular" << endl;
cout << "2-> Corporate" << endl;
cout << "3-> VIP" << endl;
cin >> ch;
while (ch<1 || ch>3)
{
cout << "Enter a valid choice->(1/2/3)" << endl;
cin >> ch;
}
if (ch == 1)
{
cout << "Enter the new number of days"
<< " for which the car can be rented"
<< " to regular customers->" << endl;
cin >> reg_days;
}
else if (ch == 2)
{
cout << "Enter the new number of days"
<< " for which the car can be rented"
<< " to corporate customers->" << endl;
cin >> cor_days;
}
else
{
cout << "Enter the new number of days"
<< " for which the car can be rented"
<< " to VIP customers->" << endl;
cin >> vip_days;
}
}
void remove_car()
{
if (no_cars == 0)
{
cout << "The inventory is already empty." << endl;
return;
}
int rem_id;
cout << "Enter the id of the car to be removed: ";
cin >> rem_id;
Car *rem = NULL;
for (int i = 0; i<no_cars; i++)
{
if (inventory[i]->get_id() == rem_id)
{
rem = inventory[i];
if (!(rem->get_avail()))
{
cout << "This car is rented to"
<< " a customer and hence, can not be removed."
<< endl;
return;
}
inventory[i] = inventory[no_cars - 1];
inventory[no_cars - 1] = NULL;
no_cars--;
}
}
if (rem == NULL)
{
cout << "ID not found.";
}
else
{
cout << "Removed" << endl;
}
}
void add_customer()
{
int type;
cout << "Which type of customer do you wish to add:"
<< endl;
cout << "1-> Regular" << endl;
cout << "2-> Corporate" << endl;
cout << "3-> VIP" << endl;
cin >> type;
while (type<0 || type > 3)
{
cout << "Enter a valid choice(1/2/3)";
cin >> type;
}
if (type == 1)
{
list[no_cust++] = new reg_customer();
}
else if (type == 2)
{
list[no_cust++] = new cor_cust();
}
else if (type == 3)
{
list[no_cust++] = new vip_customer();
}
}
void rem_cust()
{
if (no_cust == 0)
{
cout << "The list of the customers is empty->";
return;
}
int cid;
cout << "Enter the id of the customer to be removed: ";
cin >> cid;
for (int i = 0; i<no_cust; i++)
{
if (list[i]->get_cno() == cid)
{
if (list[i]->get_rent() == 1)
{
cout << "This customer currently has a car on rent"
<< " and hence, can not be removed" << endl;
return;
}
list[i] = list[no_cust - 1];
list[no_cust - 1] = NULL;
no_cust--;
break;
}
}
}
void rent_car()
{
int cno;
int id;
int index_car = -1;
int index_cust = -1;
cout << "Enter the id of the customer to rent a car: ";
cin >> cno;
cout << "Enter the id of the car to be rented: ";
cin >> id;
for (int i = 0; i<no_cars; i++)
{
if (inventory[i]->get_id() == id)
{
if (!(inventory[i]->get_avail()))
{
cout << "This car is currently"
<< " rented to some other customer." << endl;
return;
}
index_car = i;
break;
}
}
if (index_car == -1)
{
cout << "Car Not found." << endl;
return;
}
for (int i = 0; i<no_cust; i++)
{
if (list[i]->get_cno() == cno)
{
index_cust = i;
break;
}
}
if (index_cust == -1)
{
cout << "Customer not found." << endl;
return;
}
if (list[index_cust]->get_type() == "Regular")
{
int rent_days;
cout << "Enter the no of days to rent the car: ";
cin >> rent_days;
while (rent_days>reg_days)
{
cout << "Regular customers can rent a car for maximum "
<< reg_days << " days.";
cout <<endl<< "Enter the no of days to rent the car: ";
cin >> rent_days;
}
if (inventory[index_car]->get_type() == "Standard")
{
inventory[index_car]->set_avail(0);
list[index_cust]->set_rent(1);
list[index_cust]->set_days(rent_days);
list[index_cust]->set_rent_id(inventory[index_car]->get_id());
cout << "Operation sucessful." << endl;
}
else
{
cout << "Regular customer can"
<< " only avail standard cars." << endl;
}
}
else if (list[index_cust]->get_type() == "Corporate")
{
int rent_days;
cout << "Enter the no of days to rent the car: ";
cin >> rent_days;
while (rent_days>cor_days)
{
cout << "Corporate customers can "
<< "rent a car for maximum " << cor_days << " days.";
cout <<endl << "Enter the no of days to rent the car: ";
cin >> rent_days;
}
inventory[index_car]->set_avail(0);
list[index_cust]->set_rent(1);
list[index_cust]->set_days(rent_days);
list[index_cust]->set_rent_id(inventory[index_car]->get_id());
cout << "Operation sucessful." << endl;
}
else
{
int rent_days;
cout << "Enter the no of days to rent the car: ";
cin >> rent_days;
while (rent_days>vip_days)
{
cout << "VIP customers can rent a car for maximum "
<< vip_days << " days.";
cout <<endl<< "Enter the no of days to rent the car: ";
cin >> rent_days;
}
inventory[index_car]->set_avail(0);
list[index_cust]->set_rent(1);
list[index_cust]->set_days(rent_days);
list[index_cust]->set_rent_id(inventory[index_car]->get_id());
cout << "Operation sucessful." << endl;
}
}
//Define the destructor
//to free the allocated memory.
~CarRentalManagement()
{
for (int i = 0; i<no_cust; i++)
{
delete list[i];
}
for (int i = 0; i<no_cars; i++)
{
delete inventory[i];
}
}
};
int main()
{
//Define an object
//of CarRentalManagement type.
CarRentalManagement ob;
//Call the display function
//to show the available
//choices to the user.
ob.display();
//Remove system("pause")
//if not using visual studio.
system("pause");
return 0;
}
Sample Output:
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