shopping.cpp

#include <iostream>
#include <string>
#include <sstream>
#include <bits/stdc++.h>
#include <windows.h>
#include "queue1.h"
#include "animation.h"
#include "stackme.h"

using namespace std;

int search(int);
int display();
string check(int); // for checking quantity

////////////////////////////////////////////////////////////////////
struct node
{
    int ID;
    string proName;
    double prePrice;
    int quantity;
    struct node *next;
};

struct node *head = NULL;

////////////////////////////////////////////////////////////////////
void beg()
{
    system("cls");
    int id, quant; // quant for quantity
    string name;
    double pre; // pre for price
    struct node *t = new node;
    struct node *p = head;

    cout << "\t\t\tEnter product ID:-";
    cin >> id;
    t->ID = id;
    cout << "\t\t\tEnter product Name:-";
    cin >> name;
    t->proName = name;
    cout << "\t\t\tEnter product price:-";
    cin >> pre;
    t->prePrice = pre;
    cout << "\t\t\tEnter product quantity:-";
    cin >> quant;
    t->quantity = quant;
    if (head == NULL)
    {
        t->next = head;
        head = t;
    }
    else
    {
        while (p->next != NULL)
        {
            p = p->next;
        }
        p->next = t;
        t->next = NULL;
    }
    system("cls");
    cout << "\n\n\t\t\t\tThis product is Inserted!\n\n\n";
}

///////////////////////////////////////////////////////////////////////////////////////////
int search(int id) // for search item in list
{
    int count = 1;
    struct node *p = head;
    while (p != NULL)
    {
        if (p->ID == id)
            break;
        else
            count++;
        p = p->next;
    }
    return count;
}
///////////////////////////////////////////////////////////////////////
int customhash(int x, int mod)
{
    return x % mod;
}

////////////////////////////////////////////////////////////////////////
void delPro()
{
    system("cls");
    display();
    int id;
    struct node *cur = head;
    struct node *pre = head;
    cout << "\n\nEnter ID to delete that product:\n\n";
    cin >> id;
    if (head == NULL)
    {
        system("cls");
        cout << "List is empty" << endl;
    }
    int pos = 0;
    int count = display(); // for load no of nodes
    pos = search(id);      // for check whether desire node is exist or not
    if (pos <= count)
    {
        while (cur->ID != id)
        { // for delete middle area products
            pre = cur;
            cur = cur->next;
        }
        pre->next = cur->next;
        system("cls");
        cout << "\n<<item is deleted>>\n";
    }
    else
    {
        cout << "\n<<<Not found>>\n\n";
    }
}

//////////////////////////////////////////////////////////////////////////////////
void modify()
{
    int id;
    double pre;       // pre for price
    string pName;
    int nid;
    int nq; // pName for new name
    if (head == NULL)
    {
        system("cls");
        cout << "List is empty" << endl;
    }
    else
    {
        display();
        cout << "\n\nEnter ID to modify product Name and its price:\n";
        cin >> id;
        struct node *cur = head;
        int pos = 0;
        int count = display(); // for load no of nodes
        pos = search(id);
        // for check whether desire node is exist or not
        if (pos <= count)
        {
            while (cur->ID != id)
            {
                cur = cur->next;
            }
            cout << "\nOld ID : " << cur->ID << endl;
            cout << "\nOld Name : " << cur->proName << endl;
            cout << "\nOld Price : " << cur->prePrice << endl;
            cout << "\nOld Quantity : " << cur->quantity << endl;

            cout << endl
                 << endl;
            cout << "Enter new ID:";
            cin >> nid;
            cur->ID = nid;
            cout << "Enter new Name:";
            cin >> pName;
            cur->proName = pName;
            cout << "Enter new Price:";
            cin >> pre;
            cur->prePrice = pre;
            cout << "Enter new Quantity:";
            cin >> nq;
            cur->quantity = nq;
        }
        else
        {
            cout << id << " is <<<Not found>>\n\n";
        }
    }
}

//////////////////////////////////////////////////////////////////////////////////////

int display()
{
    system("cls");
    int c = 0;             // c for count products
    struct node *p = head;
    cout << "Existing products are:\n";
    cout << "ID\t\tProduct Name\t\t\tPrice\t\tQuantity\n";
    cout << "=================================================================|\n";
    while (p != NULL)
    {
        cout << p->ID << "\t\t" << p->proName << "\t\t\t" << p->prePrice << "\t\t\t" << check(p->quantity) << "\n"; // call check func and pass quantity
        p = p->next;
        c = c + 1;
    }
    cout << "\nTotal products in our store are: " << c << "\n\n\n";
    return c;
}

////////////////////////////////////////////////////////////////////////////////////////
string check(int quant)
{ // check function
    int a = quant;
    stringstream ss;
    ss << a;
    string quantity = ss.str();

    if (quant <= 0)
        return "out of stock!";
    else
        return quantity;
}

///////////////////////////////////////////////////////////////////////
void buy()
{
    system("cls");
    display();
    string products[20];
    // for display sold items
    int pay = 0, no, c = 0, price, id, i = 1;

    if (head == NULL)
    {
        cout << "\n<<<<There are no items to buy>>>>\n\n";
    }
    else
    {
        cout << "How many items do you want to buy?\n";
        cin >> no;
        int count = display(); // for store no of nodes in c
        while (i <= no)
        {
            struct node *cur = head;
            int quant, cho; a: // quant for quantity and cho for choice
            cout << "Enter the ID of the item that you want to buy: ";
            int id, pos = 0;
            cin >> id;
            if (id == -1)
            {
                system("cls");
                return;
            }
            pos = search(id);
            if (pos <= count)
            { // item is available in store
                while (cur->ID != id)
                {
                    cur = cur->next;
                }
                cout << "How many quantities do you want:";
                cin >> quant;
                if (cur->quantity < quant)
                {
                    cout << "\n\n\t\t\t----The Quantity You Entered is not available---" << endl;
                    cout << "\n\t\t\t-----(Press -1 for Back to Main Menu)------" << endl;
                    goto a;
                }
                products[c] = cur->proName; // this will contain the items buy names in the array;
                c++;

                pay = pay + (cur->prePrice * quant); // calculate Bill
                cur->quantity = cur->quantity - quant; // change quantity
                i++;
            }
            else
            {
                cout << "\n<<<<<<<<<This item is not available in our store at this time>>>>\n\n";
            }
        }
        string customer;
        cout << "\n\t\t Enter Your Name :";
        cin >> customer;
        enqueue(customer);
        system("cls");
        cout << "\n\n\n\n\t\t\tYou have bought : ";
        for (int i = 0; i < no; i++)
        { // show that item you have bought
            cout << products[i] << ",";
        }
        price = pay * (0.90); // with 10% discount
        cout << "\n\nOriginal price : " << pay;
        cout << "\n with 10% discount: " << price << "\nThank you! for shopping\n\n";
    }
}

///////////////////////////////////////////////////////////////////////////////////////
void administator()
{
    system("cls");
    int ch;

    do
    {
        // choice for below message

        cout << "\t\t============================================" << endl;
        cout << "\t\t|          Administrator Portal              |" << endl;
        cout << "\t\t============================================" << endl;

        cout << "\t\t     Enter 1 for ADD a new product    " << endl;
        cout << "\t\t     Enter 2 to display all products   " << endl;
        cout << "\t\t     Enter 3 for MODIFY Existing product" << endl;
        cout << "\t\t     Enter 4 for Delete a particular product item" << endl;
        cout << "\t\t     Enter 5 for Customers List " << endl;
        cout << "\t\t     Enter 6 for Dequeue customer" << endl;
        cout << "\t\t     Enter 7 for Generate customhash" << endl;
        cout << "\t\t     Enter 0 for Main Menu" << endl;

        cout << "\nEnter Your choice >>>";
        cin >> ch;
        switch (ch)
        {
        case 1:
            beg();
            break;
        case 2:
            system("cls");
            display();
            break;
        case 3:
            modify();
            system("cls");
            break;
        case 4:
            delPro();
            cout << "\n-------Product is Deleted-------\n";
            break;
        case 5:
            system("cls");
            cout << "|============CUSTOMERS NAMES LIST==============|\n";
            displayQueue();
            break;
        case 6:
            system("cls");
            cout << "|============CUSTOMERS NAMES LIST==============|\n";
            dequeue();
            displayQueue();
            break;
        case 7:
            int x, n;
            cout << "Enter element to generate customhash = ";
            cin >> x;
            cout << "Of the total list number : ";
            cin >> n;
            cout << "Hash of " << x << " is = " << customhash(x, n);

            break;

        default:
            system("cls");
        }
    } while (ch != 0);
}


// Main function
int main()
{

    for (int i = 0; i <= 51; i++)
    {
        push(i);
    }

    int ch;
    while (ch != 3)
    {
        // choice for below message

        cout << "\n\t\t|--------<Main Menu>-----------|";
        cout << "\n\n";
        cout << "\t\t 1) Administrator of Market\n";
        cout << "\t\t 2) Customer               \n";
        cout << "\t\t 3) Exit                    \n";

        cout << "\nEnter Your choice >>>";
        cin >> ch;
        switch (ch)
        {
        case 1:
            administator();
            break;

        case 2:
            cout << endl
                 << endl;
            bpop();
            system("pause");
            buy();
            break;

        case 3:
            cout << "\n\n\t\t\t\t\tThank You\t\t\t\t";
            break;
        }
    }
    return 0;
}