CS301 Assignment 2 spring 2021 solution by VUBWN

 // CS301 Assignment No. 2 Spring 2021  solution by vubwn.blogspot.com

#include<iostream>

#include<conio.h>

using namespace std;

int nor_que=0,exp_que=0;

class CustomerNode

{

public:

int id,item;

string name;

string type;

CustomerNode *next_add;

};

class CustomerQueue

{

public:

CustomerNode *head = NULL;

int get_id();

string get_name();

int get_item();

int set_id(int id);

string set_name(string name);

int set_item(int item);

void addQueue();

void removeQueue(int id);

void display();

};

int CustomerQueue::get_id()

{

int id;

cout<<"\n\nCustomer ID : ";

cin>>id;

return id;

}

string CustomerQueue::get_name()

{

string name;

cout<<"\n\nCustomer Name : ";

cin>>name;

return name;

}

int CustomerQueue::get_item()

{

int item;

cout<<"\n\nGrocery Items Purchased : ";

cin>>item;

return item;

}

int CustomerQueue::set_id(int id)

{

return id;

}

string CustomerQueue::set_name(string name)

{

return name;

}

int CustomerQueue::set_item(int item)

{

return item;

}

void CustomerQueue::addQueue()

{

cout<<"\n-----Enter Customer Information-----";

CustomerNode *new_node = new CustomerNode;

new_node -> id = get_id();

new_node -> name = get_name();

new_node -> item = get_item();

if(new_node -> item <= 5)

{

new_node -> type = "Express";

exp_que++;

cout<<"\n\n-----Customer Entered in Express Queue-----";

cout<<"\n\nTotal Customers in Express Queue : "<<exp_que;

}

else

{

new_node -> type = "Normal";

nor_que++;

cout<<"\n\n-----Customer Entered in Normal Queue-----";

cout<<"\n\nTotal Customers in Normal Queue : "<<nor_que;

}

new_node -> next_add = NULL;

if(head == NULL)

{

head = new_node;

}

else

{

CustomerNode *ptr = head;

while(ptr -> next_add != NULL)

{

ptr = ptr -> next_add;

}

ptr -> next_add = new_node;

}

}

void CustomerQueue::removeQueue(int id)

{

if(head -> id == id)

{

CustomerNode *ptr = head;

head = head -> next_add;

delete ptr;

}

else

{

CustomerNode *pre = head;

CustomerNode *ptr = head;

while(ptr != NULL)

{

if(ptr -> id == id)

{

pre -> next_add = ptr -> next_add;

delete ptr;

break;

}

pre = ptr;

ptr = ptr -> next_add;

}

}

}

void CustomerQueue::display()

{

CustomerNode *ptr = head;

cout<<"\n\n-----Normal Queue Customers Information-----";

while(ptr != NULL)

{

if(ptr -> type == "Normal")

{

cout<<"\n\nCustomer Name : "<<set_name(ptr -> name);

cout<<"\n\nCustomer ID : "<<set_id(ptr -> id);

cout<<"\n\nNumber of Grocery Items Purchased : "<<set_item(ptr -> item);

nor_que--;

cout<<"\n\nTotal Customers in Normal Queue : "<<nor_que;

removeQueue(ptr -> id);

}

ptr = ptr -> next_add;

}

ptr = head;

cout<<"\n\n-----Express Queue Customers Information-----";

while(ptr != NULL)

{

if(ptr -> type == "Express")

{

cout<<"\n\nCustomer Name : "<<set_name(ptr -> name);

cout<<"\n\nCustomer ID : "<<set_id(ptr -> id);

cout<<"\n\nNumber of Grocery Items Purchased : "<<set_item(ptr -> item);

exp_que--;

cout<<"\n\nTotal Customers in Express Queue : "<<exp_que;

removeQueue(ptr -> id);

}

ptr = ptr -> next_add;

}

}

main()

{

CustomerQueue obj;

char x;

do{

obj.addQueue();

cout<<"\n\nDo you want enter another customer? input y or Y for Yes and n or N for No : ";

cin>>x;

}while(x == 'y' || x == 'Y');

obj.display();

getch();

return 0;

}