Answer to Question #205443 in C++ for mahnoor

Question

sales management system project code in c++ by using oop.its use class, inheritance and function?

Answer 1

#include <iostream.h>

#include <fstream.h>

#include <process.h>

#include <string.h>

#include <stdlib.h>

#include <stdio.h>

#include <ctype.h>

#include <conio.h>

#include <dos.h>

class menu

{

public :

  void main_menu(void) ;

private :

  void edit_menu(void) ;

};

class product

{

public :

  void add_item(void) ;

  void delete_item(void) ;

  void modify_item(void) ;

  void list_of_item(void) ;

  void purchase(void) ;

private :

  int last_code(void) ;

  void delete_record(int) ;

  void modify_record(int) ;

  void display_record(int) ;

  int item_found(int) ;

  int recordno(int) ;

  void sort(void) ;

  int itemcode ;

  char itemname[30] ;

  float itemcost, itemprice ;

};

class account

{

public :

  void bill_list(void) ;

  void prepare_bill(int) ;

  int last_billno(void) ;

  void add_bill(int, int t_itemcode, char *t_itemname, float t_qty,

         float t_cost, float t_price) ;

private :

  int code, billno, length ;

  int dd, mm, yy ;

  float cost, price, quantity ;

  char name[30] ;

};

void menu :: main_menu(void)

{

  clrscr() ;

  char ch ;

  while (1)

  {

    clrscr() ;

    gotoxy(10,3) ;

    cout

        <<"*************************************************************" ;

    gotoxy(10,23) ;

    cout

        <<"*************************************************************" ;

    gotoxy(28,6) ;

    cout <<"S A L E S M A N A G E M E N T" ;

    gotoxy(28,7) ;

    cout <<"~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" ;

    gotoxy(30,9) ;

    cout <<"1: PURCHASE PRODUCTS" ;

    gotoxy(30,11) ;

    cout <<"2: LIST OF PRODUCTS" ;

    gotoxy(30,13) ;

    cout <<"3: EDIT PRODUCTS FILE" ;

    gotoxy(30,15) ;

    cout <<"4: BILLS REPORT" ;

    gotoxy(30,17) ;

    cout <<"0: QUIT" ;

    gotoxy(30,20) ;

    cout <<"Enter Your Choice : " ;

    ch = getche() ;

    if (ch == '1')

    {

      product p ;

      p.purchase() ;

    }

    else if (ch == '2')

    {

      product p ;

      p.list_of_item() ;

    }

    else if (ch == '3')

      edit_menu() ;

    else if (ch == '4')

    {

      account a ;

      a.bill_list();

    }

    else if (ch == '0')

      break ;

  }

}

void menu :: edit_menu(void)

{

  char ch ;

  while (1)

  {

    clrscr() ;

    gotoxy(10,3) ;

    cout

        <<"*************************************************************" ;

    gotoxy(10,23) ;

    cout

        <<"*************************************************************" ;

    gotoxy(32,6) ;

    cout <<"E D I T M E N U" ;

    gotoxy(32,7) ;

    cout <<"~~~~~~~~~~~~~~~~" ;

    gotoxy(32,10) ;

    cout <<"1: ADD PRODUCTS" ;

    gotoxy(32,12) ;

    cout <<"2: MODIFY PRODUCTS" ;

    gotoxy(32,14) ;

    cout <<"3: DELETE PRODUCTS" ;

    gotoxy(32,16) ;

    cout <<"0: EXIT" ;

    gotoxy(32,19) ;

    cout <<"Enter Choice : " ;

    ch = getche() ;

    if (ch == '1')

    {

      product p ;

      p.add_item() ;

      break ;

    }

    else if (ch == '2')

    {

      product p ;

      p.modify_item() ;

      break ;

    }

    else if (ch == '3')

    {

      product p ;

      p.delete_item() ;

      break ;

    }

    else if (ch == '0')

      break ;

  }

}

int product :: last_code(void)

{

  fstream file ;

  file.open("PRODUCT.DAT", ios::in) ;

  file.seekg(0,ios::beg) ;

  int t=0 ;

  while (file.read((char *) this, sizeof(product)))

    t = itemcode ;

  file.close() ;

  return t ;

}

void product :: list_of_item(void)

{

  clrscr() ;

  fstream file ;

  file.open("PRODUCT.DAT", ios::in) ;

  file.seekg(0) ;

  int row = 6 , found = 0 ;

  gotoxy(30,2) ;

  cout <<"LIST OF ITEMS" ;

  gotoxy(3,4) ;

  cout <<"ITEM CODE ITEM NAME ITEM COST ITEM PRICE" ;

  gotoxy(2,5) ;

  cout <<"***********************************************************" ;

  while (file.read((char *) this, sizeof(product)))

  {

    delay(20) ;

    found = 1 ;

    gotoxy(5,row) ;

    cout <<itemcode ;

    gotoxy(14,row) ;

    cout <<itemname ;

    gotoxy(37,row) ;

    cout <<itemcost ;

    gotoxy(51,row) ;

    cout <<itemprice ;

    if ( row == 22 )

    {

      row = 5 ;

      gotoxy(1,25) ;

      cout <<"Press any key to continue..." ;

      getche() ;

      clrscr() ;

      gotoxy(30,2) ;

      cout <<"LIST OF ITEMS" ;

      gotoxy(3,4) ;

      cout <<"ITEM CODE ITEM NAME ITEM COST ITEM PRICE" ;

      gotoxy(2,5) ;

      cout <<"***********************************************************"

         ;

    }

    else

      row++ ;

  }

  if ( !found )

  {

    gotoxy(5,10) ;

    cout <<"\7Records not found" ;

  }

  gotoxy(1,25) ;

  cout <<"Press any key to continue..." ;

  getche() ;

  file.close () ;

}

void product :: add_item(void)

{

  int tcode, valid ;

  char ch, t_itemcost[10], t_itemprice[10] ;

  tcode = last_code() ;

  tcode++ ;

  do

  {

    clrscr() ;

    gotoxy(71,2) ;

    cout <<"<0>=Exit" ;

    gotoxy(27,3) ;

    cout <<"ADDITION OF PRODUCTS" ;

    gotoxy(26,4) ;

    cout <<"********************" ;

    gotoxy(5,6) ;

    cout <<"Item Code : " <<tcode ;

    gotoxy(5,8) ;

    cout <<"Item Name : " ;

    gotoxy(5,10) ;

    cout <<"Item Cost : " ;

    gotoxy(5,12) ;

    cout <<"Item Price : " ;

    do

    {

      valid = 1 ;

      gotoxy(1,8) ;

      clreol() ;

      gotoxy(1,24) ;

      clreol() ;

      gotoxy(1,25) ;

      clreol() ;

      gotoxy(3,25) ;

      cout <<"ENTER ITEM NAME TO ADD IN THE MENU" ;

      gotoxy(5,8) ;

      cout <<"Item Name : " ;

      gets(itemname) ;

      strupr(itemname) ;

      if (itemname[0] == '0')

        return ;

      if ((strlen(itemname) < 1) || (strlen(itemname) > 20))

      {

        valid = 0 ;

        gotoxy(3,24) ;

        cout <<"\7 Range = 1..20" ;

        getch() ;

      }

    }

    while (!valid) ;

    do

    {

      valid = 1 ;

      gotoxy(1,10) ;

      clreol() ;

      gotoxy(1,24) ;

      clreol() ;

      gotoxy(1,25) ;

      clreol() ;

      gotoxy(3,25) ;

      cout <<"ENTER ITEM COST TO ADD IN THE MENU" ;

      gotoxy(5,10) ;

      cout <<"Item Cost : " ;

      gets(t_itemcost) ;

      itemcost = atof(t_itemcost) ;

      if (t_itemcost[0] == '0')

        return ;

      if (itemcost < 1 || itemcost > 800)

      {

        valid = 0 ;

        gotoxy(3,24) ;

        cout <<"\7 Range = 1..800" ;

        getch() ;

      }

    }

    while (!valid) ;

    do

    {

      valid = 1 ;

      gotoxy(1,12) ;

      clreol() ;

      gotoxy(1,24) ;

      clreol() ;

      gotoxy(1,25) ;

      clreol() ;

      gotoxy(3,25) ;

      cout <<"ENTER ITEM PRICE TO ADD IN THE MENU" ;

      gotoxy(5,12) ;

      cout <<"Item Price : " ;

      gets(t_itemprice) ;

      itemprice = atof(t_itemprice) ;

      if (t_itemprice[0] == '0')

        return ;

      if (itemprice < itemcost || itemprice > 1000)

      {

        valid = 0 ;

        gotoxy(3,24) ;

        cout <<"\7 Range = " <<itemcost <<"..1000" ;

        getch() ;

      }

    }

    while (!valid) ;

    do

    {

      gotoxy(1,15) ;

      clreol() ;

      gotoxy(1,24) ;

      clreol() ;

      gotoxy(1,25) ;

      clreol() ;

      gotoxy(5,15) ;

      cout <<"Do you want to save this record (y/n) : " ;

      ch = getche() ;

      ch = toupper(ch) ;

      if (ch == '0')

        return ;

    }

    while (ch != 'N' && ch != 'Y') ;

    if (ch == 'Y')

    {

      itemcode = tcode ;

      fstream file ;

      file.open("PRODUCT.DAT", ios::out | ios::app ) ;

      file.write((char *) this, sizeof(product)) ;

      file.close() ;

      tcode++ ;

    }

    do

    {

      gotoxy(1,17) ;

      clreol() ;

      gotoxy(1,24) ;

      clreol() ;

      gotoxy(1,25) ;

      clreol() ;

      gotoxy(5,17) ;

      cout <<"Do you want to add more records (y/n) : " ;

      ch = getche() ;

      ch = toupper(ch) ;

      if (ch == '0')

        return ;

    }

    while (ch != 'N' && ch != 'Y') ;

  }

  while (ch == 'Y') ;

}

void product :: display_record(int tcode)

{

  fstream file ;

  file.open("PRODUCT.DAT", ios::in) ;

  file.seekg(0,ios::beg) ;

  while (file.read((char *) this, sizeof(product)))

  {

    if (itemcode == tcode)

    {

      gotoxy(5,3) ;

      cout <<"Item Code : "<<itemcode ;

      gotoxy(5,4) ;

      cout <<"Item Name : "<<itemname ;

      gotoxy(5,5) ;

      cout <<"Item Cost : "<<itemcost ;

      gotoxy(5,6) ;

      cout <<"Item Price : "<<itemprice ;

      break ;

    }

  }

  file.close() ;

}

int product :: item_found(int tcode)

{

  fstream file ;

  file.open("PRODUCT.DAT", ios::in) ;

  file.seekg(0,ios::beg) ;

  int found=0 ;

  while (file.read((char *) this, sizeof(product)))

  {

    if (itemcode == tcode)

    {

      found++ ;

      break ;

    }

  }

  file.close() ;

  return found ;

}

int product :: recordno(int tcode)

{

  fstream file ;

  file.open("PRODUCT.DAT", ios::in) ;

  file.seekg(0,ios::beg) ;

  int found=0 ;

  while (file.read((char *) this, sizeof(product)))

  {

    found++ ;

    if (itemcode == tcode)

      break ;

  }

  file.close() ;

  return found ;

}

void product :: delete_record(int tcode)

{

  fstream file ;

  file.open("PRODUCT.DAT", ios::in) ;

  fstream temp ;

  temp.open("temp.dat", ios::out) ;

  file.seekg(0,ios::beg) ;

  while ( !file.eof() )

  {

    file.read((char *) this, sizeof(product)) ;

    if ( file.eof() )

      break ;

    if ( itemcode != tcode )

      temp.write((char *) this, sizeof(product)) ;

  }

  file.close() ;

  temp.close() ;

  file.open("PRODUCT.DAT", ios::out) ;

  temp.open("temp.dat", ios::in) ;

  temp.seekg(0,ios::beg) ;

  while ( !temp.eof() )

  {

    temp.read((char *) this, sizeof(product)) ;

    if ( temp.eof() )

      break ;

    file.write((char *) this, sizeof(product)) ;

  }

  file.close() ;

  temp.close() ;

}

void product :: delete_item(void)

{

  clrscr() ;

  char t_code[5], ch ;

  int t, tcode ;

  gotoxy(3,25) ;

  cout <<"Press <ENTER> to see the list" ;

  gotoxy(5,3) ;

  cout <<"Enter Item Code of the item to be deleted : " ;

  gets(t_code) ;

  t = atoi(t_code) ;

  tcode = t ;

  if (t_code[0] == '0')

    return ;

  if (tcode == 0)

  {

    list_of_item() ;

    gotoxy(1,25) ;

    clreol() ;

    gotoxy(3,25) ;

    cout <<"Press <ENTER> to Exit" ;

    gotoxy(5,24) ;

    cout <<"Enter Item Code of the item to be deleted : " ;

    gets(t_code) ;

    t = atoi(t_code) ;

    tcode = t ;

    if (tcode == 0)

      return ;

  }

  clrscr() ;

  if (!item_found(tcode))

  {

    gotoxy(5,5) ;

    cout <<"\7Record not found" ;

    getch() ;

    return ;

  }

  display_record(tcode) ;

  do

  {

    gotoxy(1,8) ;

    clreol() ;

    gotoxy(5,8) ;

    cout <<"Do you want to delete this record (y/n) : " ;

    ch = getche() ;

    ch = toupper(ch) ;

  }

  while (ch != 'N' && ch != 'Y') ;

  if (ch == 'N')

    return ;

  delete_record(tcode) ;

  gotoxy(5,15) ;

  cout <<"\7Record Deleted" ;

  getch() ;

}

void product :: modify_record(int tcode)

{

  int recno ;

  recno = recordno(tcode) ;

  int valid, t_code ;

  char ch, t_itemcost[10], t_itemprice[10], t_itemcode[5] ;

  gotoxy(71,2) ;

  cout <<"<0>=Exit" ;

  gotoxy(5,12) ;

  cout <<"Item Code : " ;

  gotoxy(5,14) ;

  cout <<"Item Name : " ;

  gotoxy(5,16) ;

  cout <<"Item Cost : " ;

  gotoxy(5,18) ;

  cout <<"Item Price : " ;

  do

  {

    gotoxy(20,12) ;

    clreol() ;

    cout <<"Change (y/n) : " ;

    ch = getche() ;

    ch = toupper(ch) ;

    if (ch == '0')

      return ;

  }

  while (ch != 'N' && ch != 'Y') ;

  valid = 0 ;

  while (ch == 'Y' && !valid)

  {

    valid = 1 ;

    gotoxy(1,12) ;

    clreol() ;

    gotoxy(1,24) ;

    clreol() ;

    gotoxy(1,25) ;

    clreol() ;

    gotoxy(3,25) ;

    cout <<"ENTER ITEM CODE TO ADD IN THE MENU" ;

    gotoxy(5,12) ;

    cout <<"Item Code : " ;

    gets(t_itemcode) ;

    t_code = atoi(t_itemcode) ;

    if (t_code == 0)

      return ;

    if (item_found(t_code) && t_code != tcode)

    {

      valid = 0 ;

      gotoxy(3,24) ;

      cout <<"\7 CODE ALREADY GIVEN" ;

      getch() ;

    }

  }

  do

  {

    gotoxy(20,14) ;

    clreol() ;

    cout <<"Change (y/n) : " ;

    ch = getche() ;

    ch = toupper(ch) ;

    if (ch == '0')

      return ;

  }

  while (ch != 'N' && ch != 'Y') ;

  valid = 0 ;

  while (ch == 'Y' && !valid)

  {

    valid = 1 ;

    gotoxy(1,14) ;

    clreol() ;

    gotoxy(1,24) ;

    clreol() ;

    gotoxy(1,25) ;

    clreol() ;

    gotoxy(3,25) ;

    cout <<"ENTER ITEM NAME TO ADD IN THE MENU" ;

    gotoxy(5,14) ;

    cout <<"Item Name : " ;

    gets(itemname) ;

    strupr(itemname) ;

    if (itemname[0] == '0')

      return ;

    if ((strlen(itemname) < 1) || (strlen(itemname) > 20))

    {

      valid = 0 ;

      gotoxy(3,24) ;

      cout <<"\7 Range = 1..20" ;

      getch() ;

    }

  }

  do

  {

    gotoxy(20,16) ;

    clreol() ;

    cout <<"Change (y/n) : " ;

    ch = getche() ;

    ch = toupper(ch) ;

    if (ch == '0')

      return ;

  }

  while (ch != 'N' && ch != 'Y') ;

  valid = 0 ;

  while (ch == 'Y' && !valid)

  {

    valid = 1 ;

    gotoxy(1,16) ;

    clreol() ;

    gotoxy(1,24) ;

    clreol() ;

    gotoxy(1,25) ;

    clreol() ;

    gotoxy(3,25) ;

    cout <<"ENTER ITEM COST TO ADD IN THE MENU" ;

    gotoxy(5,16) ;

    cout <<"Item Cost : " ;

    gets(t_itemcost) ;

    itemcost = atof(t_itemcost) ;

    if (t_itemcost[0] == '0')

      return ;

    if (itemcost < 1 || itemcost > 800)

    {

      valid = 0 ;

      gotoxy(3,24) ;

      cout <<"\7 Range = 1..800" ;

      getch() ;

    }

  }

  do

  {

    gotoxy(20,18) ;

    clreol() ;

    cout <<"Change (y/n) : " ;

    ch = getche() ;

    ch = toupper(ch) ;

    if (ch == '0')

      return ;

  }

  while (ch != 'N' && ch != 'Y') ;

  valid = 0 ;

  while (ch == 'Y' && !valid)

  {

    valid = 1 ;

    gotoxy(1,18) ;

    clreol() ;

    gotoxy(1,24) ;

    clreol() ;

    gotoxy(1,25) ;

    clreol() ;

    gotoxy(3,25) ;

    cout <<"ENTER ITEM PRICE TO ADD IN THE MENU" ;

    gotoxy(5,18) ;

    cout <<"Item Price : " ;

    gets(t_itemprice) ;

    itemprice = atof(t_itemprice) ;

    if (t_itemprice[0] == '0')

      return ;

    if (itemprice < itemcost || itemprice > 1000)

    {

      valid = 0 ;

      gotoxy(3,24) ;

      cout <<"\7 Range = " <<itemcost <<"..1000" ;

      getch() ;

    }

  }

  do

  {

    gotoxy(1,21) ;

    clreol() ;

    gotoxy(1,24) ;

    clreol() ;

    gotoxy(1,25) ;

    clreol() ;

    gotoxy(5,21) ;

    cout <<"Do you want to save this record (y/n) : " ;

    ch = getche() ;

    ch = toupper(ch) ;

    if (ch == '0')

      return ;

  }

  while (ch != 'N' && ch != 'Y') ;

  if (ch == 'N')

    return ;

  itemcode = t_code ;

  cout <<"\n" <<itemname ;

  cout <<itemcost ;

  cout <<itemprice ;

  getch() ;

  fstream file ;

  file.open("PRODUCT.DAT", ios::out | ios::ate) ;

  int location ;

  location = (recno-1) * sizeof(product) ;

  file.seekp(location) ;

  file.write((char *) this, sizeof(product)) ;

  file.close() ;

  sort() ;

  clrscr() ;

  gotoxy(5,15) ;

  cout <<"\7Record Modified" ;

  getch() ;

}

void product :: modify_item(void)

{

  clrscr() ;

  char t_code[5], ch ;

  int t, tcode ;

  gotoxy(3,25) ;

  cout <<"Press <ENTER> to see the list" ;

  gotoxy(5,3) ;

  cout <<"Enter Item Code of the item to be Modify : " ;

  gets(t_code) ;

  t = atoi(t_code) ;

  tcode = t ;

  if (t_code[0] == '0')

    return ;

  if (tcode == 0)

  {

    list_of_item() ;

    gotoxy(1,25) ;

    clreol() ;

    gotoxy(3,25) ;

    cout <<"Press <ENTER> to Exit" ;

    gotoxy(5,24) ;

    cout <<"Enter Item Code of the item to be modify : " ;

    gets(t_code) ;

    t = atoi(t_code) ;

    tcode = t ;

    if (tcode == 0)

      return ;

  }

  clrscr() ;

  if (!item_found(tcode))

  {

    gotoxy(5,5) ;

    cout <<"\7Record not found" ;

    getch() ;

    return ;

  }

  display_record(tcode) ;

  do

  {

    gotoxy(5,8) ;

    cout <<"Do you want to Modify this record (y/n) : " ;

    ch = getche() ;

    ch = toupper(ch) ;

  }

  while (ch != 'N' && ch != 'Y') ;

  if (ch == 'N')

    return ;

  modify_record(tcode) ;

}

void product :: sort(void)

{

  int i=0,j ;

  product arr[100] ;

  product temp ;

  fstream file ;

  file.open("PRODUCT.DAT", ios::in) ;

  file.seekg(0,ios::beg) ;

  while (file.read((char *) &arr[i], sizeof(product)))

    i++ ;

  int size ;

  size = i ;

  file.close() ;

  for (i=1; i<size; i++)

    for (j=0; j<size-i; j++)

    {

      if (arr[j].itemcode > arr[j+1].itemcode)

      {

        temp=arr[j];

        arr[j]=arr[j+1];

        arr[j+1]=temp;

      }

    }

  file.open("PRODUCT.DAT", ios::out) ;

  for (i=0; i<size; i++)

    file.write((char *) &arr[i], sizeof(product)) ;

  file.close() ;

}

void product :: purchase(void)

{

  clrscr() ;

  account a ;

  int t_billno, purchased=0 ;

  t_billno = a.last_billno() ;

  t_billno++ ;

  char t_code[5], ch;

  float t_quantity ;

  int t, tcode, i=0, valid ;

  float qty ;

  int t_itemcode ;

  float t_qty, t_cost, t_price ;

  char t_itemname[30] ;

  struct date d;

  int d1, m1, y1 ;

  getdate(&d);

  d1 = d.da_day ;

  m1 = d.da_mon ;

  y1 = d.da_year ;

  do

  {

    clrscr() ;

    gotoxy(3,25) ;

    cout <<"Press <ENTER> to see the list" ;

    gotoxy(5,3) ;

    cout <<"Enter Item Code of the item to be Purchase : " ;

    gets(t_code) ;

    t = atoi(t_code) ;

    tcode = t ;

    if (t_code[0] == '0')

    {

      if (purchased)

        a.prepare_bill(t_billno) ;

      return ;

    }

    if (tcode == 0)

    {

      list_of_item() ;

      gotoxy(1,25) ;

      clreol() ;

      gotoxy(3,25) ;

      cout <<"Press <ENTER> to Exit" ;

      gotoxy(5,24) ;

      cout <<"Enter Item Code of the item to be Purchase : " ;

      gets(t_code) ;

      t = atoi(t_code) ;

      tcode = t ;

      if (tcode == 0)

      {

        if (purchased)

          a.prepare_bill(t_billno) ;

        return ;

      }

    }

    clrscr() ;

    if (!item_found(tcode))

    {

      gotoxy(5,5) ;

      cout <<"\7Item Code not found" ;

      getch() ;

      if (purchased)

        a.prepare_bill(t_billno) ;

      return ;

    }

    gotoxy(60,2) ;

    cout <<"Date:" <<d1 <<"/" <<m1 <<"/" <<y1 ;

    display_record(tcode) ;

    do

    {

      valid = 1 ;

      gotoxy(1,8) ;

      clreol() ;

      gotoxy(1,24) ;

      clreol() ;

      gotoxy(1,25) ;

      clreol() ;

      gotoxy(3,25) ;

      cout <<"ENTER QUANTITY TO BE PURCHASE IN Kg." ;

      gotoxy(5,8) ;

      cout <<"Quantity : " ;

      cin>>t_quantity ;

      qty=t_quantity ;

      if (t_quantity == 0)

      {

        if (purchased)

          a.prepare_bill(t_billno) ;

        return ;

      }

      if (qty < 1 || qty > 800)

      {

        valid = 0 ;

        gotoxy(3,24) ;

        cout <<"\7 Range = 1..800" ;

        getch() ;

      }

    }

    while (!valid) ;

    do

    {

      gotoxy(5,10) ;

      clreol() ;

      gotoxy(5,10) ;

      cout <<"Do you want to cancel this purchase (y/n) : " ;

      ch = getche() ;

      ch = toupper(ch) ;

    }

    while (ch != 'N' && ch != 'Y') ;

    if (ch == 'N')

    {

      purchased = 1 ;

      fstream file ;

      file.open("PRODUCT.DAT", ios::in) ;

      file.seekg(0,ios::beg) ;

      while (file.read((char *) this, sizeof(product)))

      {

        if (itemcode == tcode)

        {

          t_itemcode = itemcode ;

          strcpy(t_itemname,itemname) ;

          t_cost = itemcost ;

          t_price = itemprice ;

          t_qty = qty ;

          a.add_bill(t_billno,t_itemcode,t_itemname,t_qty,t_cost,t_price) ;

          i++ ;

          break ;

        }

      }

      file.close() ;

    }

    do

    {

      gotoxy(5,12) ;

      clreol() ;

      gotoxy(5,12) ;

      cout <<"Do you want to purchase more (y/n) : " ;

      ch = getche() ;

      ch = toupper(ch) ;

    }

    while (ch != 'N' && ch != 'Y') ;

  }

  while (ch == 'Y') ;

  a.prepare_bill(t_billno) ;

}

int account :: last_billno(void)

{

  fstream file ;

  file.open("BILL.DAT", ios::in) ;

  file.seekg(0,ios::beg) ;

  int t=0 ;

  while (file.read((char *) this, sizeof(account)))

    t = billno ;

  file.close() ;

  return t ;

}

void account :: add_bill(int t_billno, int t_itemcode, char

             t_itemname[30], float t_qty, float t_cost, float t_price)

{

  struct date d;

  int d1, m1, y1 ;

  getdate(&d);

  d1 = d.da_day ;

  m1 = d.da_mon ;

  y1 = d.da_year ;

  dd = d1 ;

  mm = m1 ;

  yy = y1 ;

  code = t_itemcode ;

  strcpy(name,t_itemname) ;

  cost = t_cost ;

  price = t_price ;

  quantity = t_qty ;

  billno = t_billno ;

  fstream file ;

  file.open("BILL.DAT", ios::out | ios:: app ) ;

  file.write((char *) this, sizeof(account)) ;

  file.close() ;

}

void account :: prepare_bill(int t_billno)

{

  clrscr() ;

  struct date d;

  int d1, m1, y1 ;

  getdate(&d);

  d1 = d.da_day ;

  m1 = d.da_mon ;

  y1 = d.da_year ;

  float total=0.0, total_bill=0.0 ;

  gotoxy(33,3) ;

  cout <<"CUSTOMER BILL" ;

  gotoxy(55,5) ;

  cout <<"Date:" <<d1 <<"/" <<m1 <<"/" <<y1 ;

  gotoxy(8,7) ;

  cout <<"ITEMS PURCHASED" ;

  gotoxy(8,8) ;

  cout <<"+++++++++++++++" ;

  gotoxy(8,9) ;

  cout <<"Item code Item name Cost Price Qty Total"

     ;

  gotoxy(8,10) ;

  cout <<"------------------------------------------------------------"

     ;

  int row=11 ;

  fstream file ;

  file.open("BILL.DAT", ios::in) ;

  file.seekg(0) ;

  while (file.read((char *) this, sizeof(account)) !=0 )

  {

    if (billno == t_billno)

    {

      gotoxy(8,5) ;

      cout <<"BILL NO. # " <<billno ;

      gotoxy(8,6) ;

      cout <<"===============" ;

      gotoxy(10,row) ;

      cout <<code ;

      gotoxy(18,row) ;

      cout <<name ;

      gotoxy(39,row) ;

      cout <<cost ;

      gotoxy(47,row) ;

      cout <<price ;

      gotoxy(56,row) ;

      cout <<quantity ;

      total = quantity * price ;

      gotoxy(63,row) ;

      cout <<total ;

      total_bill = total_bill + total ;

      row++ ;

    }

  }

  file.close() ;

  gotoxy(39,row+1) ;

  cout <<"TOTAL BILL: Rs." <<total_bill <<" /=" ;

  getch() ;

}

void account :: bill_list(void)

{

  clrscr() ;

  fstream file ;

  file.open("BILL.DAT", ios::in) ;

  file.seekg(0) ;

  int row=5, found=0, pageno=1, prev_billno=0, flag=0 ;

  float total=0.0, total_bill=0.0 ;

  gotoxy(30,2) ;

  cout <<"LIST OF BILLS" ;

  gotoxy(3,4) ;

  cout <<"Billno. Date Item Code Item name Cost Pri Qty Total" ;

  gotoxy(3,5) ;

  cout

      <<"===========================================================================" ;

  while (file.read((char *) this, sizeof(account)))

  {

    row++ ;

    delay(20) ;

    found = 1 ;

    if (prev_billno != billno)

    {

      if (flag)

      {

        gotoxy(52,row) ;

        cout <<"TOTAL BILL: Rs." <<total_bill <<"/=" ;

        total_bill = 0.0 ;

        row++ ;

      }

      gotoxy(4,row) ;

      cout <<billno ;

    }

    flag = 1 ;

    gotoxy(11,row) ;

    cout <<dd <<"/" <<mm <<"/" <<yy ;

    gotoxy(24,row) ;

    cout <<code ;

    gotoxy(32,row) ;

    cout <<name ;

    gotoxy(52,row) ;

    cout <<cost ;

    gotoxy(59,row) ;

    cout <<price ;

    gotoxy(67,row) ;

    cout <<quantity ;

    total = quantity * price ;

    gotoxy(73,row) ;

    cout <<total ;

    total_bill = total_bill + total ;

    if ( row >= 23 )

    {

      row = 5 ;

      gotoxy(66,1) ;

      cout <<"Page no. : " <<pageno ;

      pageno++ ;

      gotoxy(1,25) ;

      cout <<"Press any key to continue..." ;

      getche() ;

      clrscr() ;

      gotoxy(30,2) ;

      cout <<"LIST OF BILLS" ;

      gotoxy(3,4) ;

      cout <<"Billno. Date Item Code Item name CostPrice Qty Total" ;

      gotoxy(3,5) ;

      cout

          <<"===========================================================================" ;

    }

    prev_billno = billno ;

  }

  row++ ;

  gotoxy(52,row) ;

  cout <<"TOTAL BILL: Rs." <<total_bill <<"/=" ;

  if ( !found )

  {

    gotoxy(5,10) ;

    cout <<"\7Records not found" ;

  }

  gotoxy(66,1) ;

  cout <<"Page no. : " <<pageno ;

  gotoxy(1,25) ;

  cout <<"Press any key to continue..." ;

  getche() ;

  file.close () ;

}

void main(void)

{

  clrscr() ;

  menu m ;

  m.main_menu() ;

}