hotel booking

#include<iostream.h>
#include<graphics.h>
#include<conio.h>
#include<dos.h>
#include<string.h>
#include<fstream.h>
#include<process.h>
#include<stdlib.h>
#include<stdio.h>
#include<ctype.h>

class menu
{
    public:
        void main_menu(void);
        void help(void);
        void enter_password(void);
        void graphics_function(void);
        void circle_function(void);
//      void certificate(void);
        void acknowledgement(void);
        void introduction();
        void references(void);
        void display(void);
        void close_function(void);
        void line_hor(int, int, int, char);
        void line_ver(int, int, int, char);
    private:
        void edit_menu(void);
        void report_menu(void);
        void room_edit_menu(void);
        void customer_edit_menu(void);
        void box_password(void);
        void box_menu(void);
};

class room
{
    public:
        void add(void);
        void modify(void);
        void deletion(void);
        void display_room_record(void);
        void display_list(void);
        int room_found(int);
        void change_status(int,char);
        char room_status(int);
        float get_data(int);
    private:
        int recordno(int);
        void display_record(int);
        int roomno;
        char roomcode[5], status;
        float tarriff;
};

class customer
{
    public:
        void checkin(void);
        void checkout(void);
        void modify(void);
        void deletion(void);
        void display_list(void);
        void display_customer_record(void);
    private:
        int recordno(int);
        void display_record(int);
        void delete_record(int);
        int roomno;
        char name[21], phone[8];
        float advance, misc, room_srv;
};

class account
{
    public:
    void prepare_bill(int, float, char t_name[21], float, float, float);
};

void menu::line_hor(int column1, int column2, int row, char ch)
{
    for(column1;column1<=column2; column1++)
    {
        gotoxy(column1,row);
        cin>>ch;
    }
}

void menu::line_ver(int row1, int row2, int column, char ch)
{
    for(row1; row1<=row2; row1++)
    {
        gotoxy(column,row1);
        cin>>ch;
    }
}

void menu::box_password(void)
{
    line_hor(2,79,1,219);
    line_hor(2,79,24,219);
    line_ver(1,24,2,219);
    line_ver(1,24,79,219);
    delay(50);
    line_hor(3,78,2,219);
    line_hor(3,78,23,219);
    line_ver(2,23,3,219);
    line_ver(2,23,78,219);
    delay(50);
    line_hor(4,77,3,219);
    line_hor(4,77,22,219);
    line_ver(3,22,4,219);
    line_ver(3,22,77,219);
    delay(50);
    line_hor(5,76,4,178);
    line_hor(5,76,21,178);
    line_ver(4,21,5,178);
    line_ver(4,21,76,178);
    delay(50);
    line_hor(6,75,5,178);
    line_hor(6,75,20,178);
    line_ver(5,20,6,178);
    line_ver(5,20,75,178);
    delay(50);
    line_hor(7,74,6,178);
    line_hor(7,74,19,178);
    line_ver(6,19,7,178);
    line_ver(6,19,74,178);
    delay(50);
    line_hor(8,73,7,177);
    line_hor(8,73,18,177);
    line_ver(7,18,8,177);
    line_ver(7,18,73,177);
    delay(50);
    line_hor(9,72,8,177);
    line_hor(9,72,17,177);
    line_ver(8,17,9,177);
    line_ver(8,17,72,177);
    delay(50);
    line_hor(10,71,9,177);
    line_hor(10,71,16,177);
    line_ver(9,16,10,177);
    line_ver(9,16,91,177);
    delay(50);
}

void menu::box_menu(void)
{
    line_hor(2,79,1,219);
    line_hor(2,79,24,219);
    line_ver(1,24,2,219);
    line_ver(1,24,79,219);
    delay(50);
    line_hor(3,78,2,178);
    line_hor(3,78,23,178);
    line_ver(2,23,3,178);
    line_ver(2,23,78,178);
    delay(50);
    line_hor(4,77,3,177);
    line_hor(4,77,22,177);
    line_ver(3,22,4,177);
    line_ver(3,22,77,177);
    delay(50);
}

void menu::enter_password(void)
{
    clrscr();
    char pass1,pass2,pass3;
    box_password();
    gotoxy(30,12);
    cout<<"Enter the password:";
    pass1=getch();
    cout<<"*";
    pass2=getch();
    cout<<"*";
    pass3=getch();
    cout<<"*";
//  sound(500);
    delay(100);
    nosound();
    if (pass1=='h'&&pass2=='m'&&pass3=='s')
    return;
    gotoxy(30,12);
    cout<<"WORNG PASSWORD";
    gotoxy(2,1);
    getch();
    exit(0);
}

void menu::main_menu(void)
{
    char ch;
    char h[]={""};
    char m[]={""};
    int j;
    while(1)
    {
        clrscr();
        box_menu();
        j=9;
        for(int i=0; h[i]!='0';i++);
{
    gotoxy(15,j);
    j++;
    cout<<h[i];
}
j=7;
for(i=0; m[i]!='0'; i++)
{
    gotoxy(65,j);
    j++;
    cout<<m[i];
}
gotoxy(30,5);
cout<<"1. CHECK IN";
gotoxy(30,7);
cout<<"2. CHECK OUT";
gotoxy(30,9);
cout<<"3. CUSTOMER RECORD";
gotoxy(30,11);
cout<<"4. ROOM RECORD";
gotoxy(30,13);
cout<<"5. EDIT";
gotoxy(30,15);
cout<<"6. REPORT";
gotoxy(30,17);
cout<<"7. HELP";
gotoxy(30,19);
cout<<"0. EXIT";
gotoxy(30,21);
cout<<"Enter your Choice:";
ch=getch();
if(ch=='1')
{
    customer c;
    c.checkin();
}
else
if(ch=='2')
{
    customer c;
    c.checkout();
}
if(ch=='3')
{
    customer c;
    c.display_customer_record();
}
else
if(ch=='4')
{
    room r;
    r.display_room_record();
}
else
if(ch=='5')
            edit_menu();
        else
        if(ch=='6')
            report_menu();
        else
        if(ch=='7')
        {
        clrscr();
        textcolor(BLUE+BLINK);
        textbackground(BLACK);
        gotoxy(31,1);
        cprintf("WELCOME TO HELP");
        textcolor(LIGHTGRAY);
        textbackground(BLACK);
        gotoxy(3,3);
        cout<<"TO ADD/MODIFY/DELETE ROOM RECORDS::";
        gotoxy(3,4);
        cout<<"-------------------------------------";
        gotoxy(3,5);
        cout<<"1. Select edit option(5).";
        gotoxy(3,7);
        cout<<"2. Go to option(1).";
        gotoxy(3,9);
        cout<<"3. Select (1),(2) or (3) to add, modify or delete rooms";
        cout<<"records.";
        gotoxy(3,12);
        cout<<"TO CHECK IN OR CHECK OUT THE CUSTOMER::";
        gotoxy(3,13);
        cout<<"-------------------------------------";
        gotoxy(3,14);
        cout<<"1. Select option(1) for check in.";
        gotoxy(3,16);
        cout<<"2. Select option(2) for check out and bill";
        cout<<"preparation.";
        gotoxy(3,19);
        cout<<"TO SEARCH FOR ROOM/CUSTOMER::";
        gotoxy(3,20);
        cout<<"--------------------------------------";
        gotoxy(3,21);
        cout<<"1. Select option(3) for room search.";
        gotoxy(3,23);
        cout<<"2. Select option(4) for customer search.";
        textcolor(LIGHTGRAY+BLINK);
        gotoxy(27,25);
        cprintf("Press any key to continue");
        textcolor(LIGHTGRAY);
        getch();
        clrscr();
        textcolor(BLUE+BLINK);
        textbackground(BLACK);
        gotoxy(31,1);
        cprintf("WELCOME TO HELP");
        textcolor(WHITE);
        textbackground(BLACK);
        gotoxy(3,3);
        cout<<"REPORT GENERATION (ROOM/CUSTOMER)::";
        gotoxy(3,4);
        cout<<"-----------------------------------------";
        gotoxy(3,6);
        cout<<"1. Select report option(6), select(1) to view record";
        cout<<" of customers.";
        gotoxy(3,11);
        cout<<"TO MODIFY/DELETE CUSTOMER RECORDS::";
        gotoxy(3,12);
        cout<<"-----------------------------------------";
        gotoxy(3,14);
        cout<<"1. Select edit option(5).";
        gotoxy(3,16);
        cout<<"2. Go to option(2).";
        gotoxy(3,18);
        cout<<"3. Select (1) or (2) to modify or delete customer";
        cout<<"records.";
        textcolor(LIGHTGRAY+BLINK);
        gotoxy(27,25);
        cprintf("Press any key to continue");
        textcolor(15);
        getch();
        }
        closegraph();
        if(ch=='0')
        break;
    }
}

void menu::edit_menu(void)
{
    char ch;
    while(1)
    {
        clrscr();
        box_menu();
        gotoxy(30,6);
        cout<<"EDIT";
        gotoxy(30,8);
        cout<<"1. ROOM RECORDS";
        gotoxy(30,10);
        cout<<"2. CUSTOMER RECORDS";
        gotoxy(30,12);
        cout<<"0. EXIT";
        gotoxy(30,15);
        cout<<"Enter your choice:";
        ch=getch();
        if(ch=='1')
            room_edit_menu();
        else
        if(ch=='2')
            customer_edit_menu();
        else
        if(ch=='0')
        break;
    }
}

void menu::room_edit_menu(void)
{
    char ch;
    while(1)
    {
        clrscr();
        box_menu();
        gotoxy(30,8);
        cout<<"1. ADD FROM RECORDS";
        gotoxy(30,10);
        cout<<"2. MODIFY ROOM RECORDS";
        gotoxy(30,12);
        cout<<"3. DELETE ROOM RECORDS";
        gotoxy(30,14);
        cout<<"0. EXIT";
        gotoxy(30,17);
        cout<<"Enter your choice:";
        if(ch=='1')
        {
            room r;
            r.add();
        }
        else
        if(ch=='2')
        {
            room r;
            r.modify();
        }
        else
        if(ch=='3')
        {
            room r;
            r.deletion();
        }
        else
        if(ch=='0')
        break;
    }
}

void menu::customer_edit_menu(void)
{

    char ch;
    while(1)
    {
        clrscr();
        box_menu();
        gotoxy(30,8);
        cout<<"1. MODIFY CUSTOMER RECORDS";
        gotoxy(30,10);
        cout<<"2. DELETE CUSTOMER RECORDS";
        gotoxy(30,12);
        cout<<"0. EXIT";
        gotoxy(30,15);
        cout<<"Enter your choice:";
        ch=getch();
        if(ch=='1')
        {
            customer c;
            c.modify();
        }
        else
        if(ch=='2')
        {
            customer c;
            c.deletion();
        }
        else
        if(ch=='0')
        break;
    }
}

void menu::report_menu(void)
{
    char ch;
    while(1)
    {
        clrscr();
        box_menu();
        gotoxy(30,8);
        cout<<"1. LIST OF ROOMS";
        gotoxy(30,10);
        cout<<"2. LIST OF CUSTOMERS";
        gotoxy(30,12);
        cout<<"0. EXIT";
        gotoxy(30,15);
        cout<<"Enter your choice:";
        ch=getch();
        if(ch=='1')
        {
            room r;
            r.display_list();
        }
        else
        if(ch=='2')
        {
            customer c;
            c.display_list();
        }
        else
        if(ch=='0')
        break;
    }
}

int room::room_found(int t_roomno)
{
    fstream file;
    file.open("ROOM.TXT",ios::in);
    file.seekg(0);
    int found=0;
    while(file.read((char*) this, sizeof(room)))
    {
        if(roomno==t_roomno)
            found=1;
    }
    file.close();
    return found;
}

void room::display_list(void)
{
    clrscr();
    fstream file;
    file.open("ROOM TEXT",ios::in);
    file.seekg(0);
    int row=5, found=0, pageno=1;
    gotoxy(18,1);
    cout<<"LIST OF ROOMS";
    gotoxy(1,3);
    cout<<"Room code     Rooom no.     Status     Tarriff";
    while(file.read((char*) this, sizeof(room)));
     {
        delay(20);
        found=1;
        gotoxy(2,row);
        cin>>roomcode;
        gotoxy(16,row);
        cin>>roomno;
        gotoxy(29,row);
        cin>>status;
        gotoxy(42,row);
        cin>>tarriff;
        if(row==23)
        {
        row=5;
        gotoxy(66,1);
        cout<<"Page no.:"<<pageno;
        pageno++;
        gotoxy(1,25);
        cout<<"Press any key to continue...";
        getch();
        clrscr();
        gotoxy(18,1);
        cout<<"LIST OF ROOMS";
        gotoxy(1,3);
        cout<<"Room code     Rooom no.     Status     Tarriff";
        }
        else
            row++;
    }
    if(!found)
    {
        sound(500);
        delay(100);
        nosound();
        gotoxy(1,5);
        cout<<"Records not found";
    }
    gotoxy(66,1);
    cout<<"page no.:"<<pageno;
    gotoxy(1,25);
    cout<<"Pree any key to continue...";
    getch();
    file.close();
}

int room::recordno(int t_roomno)
{
    fstream file;
    file.open("ROOM.TXT",ios::in);
    file.seekg(0);
    int count=0;
    while(file.read((char*) this, sizeof(room)))
    {
        count++;
        if(t_roomno==roomno)
            break;
    }
    file.close();
    return count;
}

void room::display_record(int t_roomno)
{
    fstream file;
    file.open("ROOM.TXT",ios::in);
    file.seekg(0);
    int found=0;
    while(file.read((char *) this, sizeof(room))&&!found)
    {
        if (t_roomno==roomno)
        {
            found=1;
            gotoxy(1,5);
            cout<<"Room code:"<<roomcode;
            gotoxy(1,6);
            cout<<"Room no.:"<<roomno;
            gotoxy(1,7);
            cout<<"Status:"<<status;
            gotoxy(1,8);
            cout<<"Tarriff:"<<tarriff;
        }
    }
    file.close();
}

void room::display_room_record(void)
{
    clrscr();
    int valid;
    int t_roomno;
    gotoxy(1,3);

    cout<<"Enter the Room no.:";
    cin>>t_roomno;
    if(!room_found(t_roomno))
    {
        sound(500);
        delay(100);
        nosound();
        gotoxy(1,25); clreol();
        gotoxy(1,24);
        cout<<"ROOM NO. NOT FOUND";
        gotoxy(1,25);
        cout<<"Press any key to continue...";
        getch();
        return;
    }
    clrscr();
    gotoxy(5,3);
    cout<<"ROOM RECORD";
    display_record(t_roomno);
    gotoxy(1,25);
    cout<<"Press any key to continue...";
    getch();
}

void room::change_status(int t_roomno, char t_status)
{
    int recno;
    recno=recordno(t_roomno);
    fstream file;
    file.open("ROOM.TXT",ios::out|ios::ate);
    int location;
    location=(recno-1)*sizeof(room);
    file.seekg(location);
    status=t_status;
    file.write((char*) this, sizeof(room));
    file.close();
}

char room::room_status(int t_roomno)
{
    fstream file;
    file.open("ROOM.TXT",ios::in);
    file.seekg(0);
    int found=0;
    char t_status;
    while(file.read((char*) this, sizeof(room))&&!found)
    {
        if(t_roomno==roomno)
        {
            found=1;
            t_status=status;
        }
    }
    file.close();
    return t_status;
}

float room::get_data(int t_roomno)
{
    fstream file;
    file.open("ROOM.TXT",ios::in);
    file.seekg(0);
    float t_tarriff;
    while(file.read((char*) this, sizeof(room)));
    {
        if(t_roomno==roomno)
        {
            t_tarriff=tarriff;

        }
    }
    file.close();
    return t_tarriff;
}

void room::add(void)
{
    char ch;
    char t_rcode[5];
    int t_roomno;
    char t_status;
    float t_tarriff;
    do
    {
    fstream file;
    file.open("ROOM.TXT",ios::out|ios::app);
    clrscr();
    gotoxy(1,1);
    cout<<"Enter the details for the room";
    gotoxy(1,3);
    cout<<"Code:";
    gotoxy(1,4);
    cout<<"Room no.:";
    gotoxy(1,5);
    cout<<"Status:";
    gotoxy(1,6);
    cout<<"Tarriff:";
    gotoxy(20,11);
    cout<<"SS: SINGLE SUITE";
    gotoxy(20,12);
    cout<<"SR: SINGLE ROOM:";
    gotoxy(20,13);
    cout<<"DR: DOUBLE ROOM:";
    gotoxy(20,14);
    cout<<"DS: DOUBLE SUITE:";
    int valid=0;
    do
    {
        valid=1;
        gotoxy(1,25);
        cout<<"ENTER THE ROOM CODE (SS/SR/DR/DS)";
        gotoxy(13,3);
        cin>>t_rcode;
        strupr(t_rcode);
        char*string[4]={"SS","DR","SR","DS"};
        int result, count=0;
        for(int i=0; i<4; i++)
        {
            result=strcmpi(t_rcode,string[i]);
            if(result !=0)
            count++;
        }
        if(count==4)
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"INVALID CODE";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,3); clreol();
        }
    } while(valid==0);
    for(int i=11; i<14; i++)
    {
        gotoxy(1,1); clreol();
    }
    do
    {
        valid=1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE ROOM NUMBER";
        gotoxy(13,4);
        cin>>t_roomno;
        if(t_roomno<=0||t_roomno>900)
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"IT SHOULD NOT BE NEGATIVE OR ZERO OR";
            cout<<"GREATER THAN 900";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,4); clreol();
        }
        if(room_found(t_roomno))
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"ROOM NO. ALREADY EXIST";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,4); clreol();
        }
    } while(!valid);
    do
    {
        valid=1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE ROOM STATUS: V=vacant, O=occupied";
        gotoxy(13,5);
        cin>>t_status;
        t_status=toupper(t_status);
        if(t_status !='0' && t_status !='v')
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"INVALID DATE ENTERED";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,5); clreol();
        }
    } while(!valid);
    do
    {
        valid=1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE TARRIFF FOR THE ROOM";
        gotoxy(13,6);
        cin>>t_tarriff;
        if(t_tarriff<=0)
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"IT SHOULD NOT BE NEGATIVE OR ZERO";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,6); clreol();
        }
    } while(!valid);
    gotoxy(1,8);
    cout<<"Do you want to save the record (y/n):";
    do
    {
        valid=1;
        gotoxy(42,8);
        ch=getch();
        ch=toupper(ch);
        if(ch !='Y' && ch !='N')
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(42,8); clreol();
        }
    } while(!valid);
    if(ch=='Y')
    {
        strcpy(roomcode,t_rcode);
        roomno=t_roomno;
        status=t_status;
        tarriff=t_tarriff;
        file.write((char*) this, sizeof(room));
    }
    gotoxy(1,9);
    cout<<"Do you want to add more records (y/n):";
    do
    {
        valid=1;
        gotoxy(42,9);
        ch=getch();
        ch=toupper(ch);
        if(ch !='Y' && ch !='N')
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(42,9); clreol();
        }
    } while(!valid);
    file.close();
    } while(ch=='Y');
}

void room::modify(void)
{
    clrscr();
    int valid;
    char ch;
    char t_rcode[5];
    int t_roomno, tr;
    char t_status;
    float t_tarriff;
    fstream file;
    file.open("ROOM.TXT",ios::out|ios::ate);
    gotoxy(1,3);
    cout<<"Enter the Room no. to be modified";
    cin>>tr;
    if(!room_found(tr))
    {
        sound(500);
        delay(100);
        nosound();
        gotoxy(1,25); clreol();
        gotoxy(1,24);
        cout<<"ROOM NO. NOT FOUND";
        gotoxy(1,25);
        cout<<"Press any key to continue...";
        getch();
        return;
    }
    display_record(tr);
    gotoxy(1,10);
    cout<<"Do you want to modify this Room Record (y/n):";
    do
    {
        valid=1;
        gotoxy(48,10);
        ch=getch();
        ch=toupper(ch);
        if(ch !='Y' && ch !='N')
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(42,9); clreol();
        }
    } while(!valid);
    if (ch=='N')
        return;
    gotoxy(1,12);
    cout<<"ENTER THE NEW DATA FOR THE ROOM";
    gotoxy(1,14);
    cout<<"Code:";
    gotoxy(1,15);
    cout<<"Room no.:";
    gotoxy(1,16);
    cout<<"Status:";
    gotoxy(1,17);
    cout<<"Tarriff:";
    do
    {
        valid=1;
        gotoxy(1,25);
        cout<<"ENTER THE ROOM CODE (SS/SR/DR/DS)";
        gotoxy(13,14);
        cin>>t_rcode;
        strupr(t_rcode);
        char *string[4]={"SS","DR","SR","DS"};
        int result, count=0;
        for(int i=0; i<4; i++)
        {
            result=strcmpi(t_rcode,string[i]);
            if(result !=0)
            count++;
        }
        if(count==4)
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"INVALID CODE";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,14); clreol();
        }
    } while(valid==0);
    do
    {
        valid=1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE ROOM NUMBER";
        gotoxy(13,15);
        cin>>t_roomno;
        if(t_roomno<=0||t_roomno>900)
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"IT SHOULD NOT BE NEGATIVE OR ZERO OR";
            cout<<"GREATER THAN 900";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,15); clreol();
        }
        if(room_found(t_roomno)&&t_roomno !=tr)
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"ROOM NO. ALREADY EXIST";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,15); clreol();
        }
    } while(!valid);
    do
    {
        valid=1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE ROOM STATUS: V=vacant, O=occupied";
        gotoxy(13,16);
        cin>>t_status;
        t_status=toupper(t_status);
        if(t_status !='0' && t_status !='V')
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"INVALID DATA ENTERED";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,16); clreol();
        }
    } while(!valid);
    do
    {
        valid=1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE TARRIFF FOR THE ROOM";
        gotoxy(13,17);
        cin>>t_tarriff;
        if(t_tarriff<=0)
        {
            valid=0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"IT SHOULD NOT BE NEGATIVE OR ZERO";
        gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(13,17); clreol();
        }
    } while (!valid);
    gotoxy(1,19);
    cout<<"Do you want to save the record (y/n) : ";
    do
    {
        valid = 1;
        gotoxy(42,19);
        ch = getch();
        ch = toupper(ch);
        if (ch !='Y' && ch != 'N')
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(42,19); clreol();
        }
    } while(!valid);
    if (ch=='Y')
    {
        int recno;
        recno = recordno(tr);
        int location;
        location = (recno-1) * sizeof (room);
        file.seekp(location);
        strcpy (roomcode,t_rcode);
        roomno = t_roomno;
        status = t_status;
        tarriff = t_tarriff;
        file.write((char *) this, sizeof (room));
    }
    file.close ();
}
void room :: deletion(void)
{
    clrscr();
    int valid;
    char ch;
    int t_roomno;
    gotoxy(1,3);
    cout<<"Enter the room no. to be deleted ";
    cin>>t_roomno;
    if (!room_found( t_roomno))
    {
    sound(500);
    delay(100);
    nosound();
    gotoxy(1,25); clreol();
    gotoxy(1,24);
    cout<<"ROOM NO. NOT FOUND";
    gotoxy(1,25);
    cout<<"Press any key to continue...";
    getch();

}
display_record(t_roomno);
gotoxy(1,10);
cout<<"Do you want to delete this Room record (y/n) : ";
do
{
    valid = 1;
    gotoxy(48,10);
    ch = getche();
    ch = toupper (ch);
    if (ch != 'Y' && ch != 'N')
    {
        valid = 0;
        sound(500);
        delay(100);
        nosound();
        gotoxy(42,9); clreol();
    }
} while ( !valid);
if (ch == 'N')
        return;
fstream file;
file.open("ROOM.TXT", ios::in);
fstream temp;
temp.open ("temp.txt", ios::out);
while (!file.eof())
{
    file.read((char *) this, sizeof(room));
    if ( file.eof())
            break;
    if ( roomno !=t_roomno)
            temp.write((char *) this, sizeof(room));
}
file.close();
temp.close();
file.open("ROOM.TXT", ios::out);
temp.open("temp.txt", ios::in);
temp.seekg(0);
while (!temp.eof())
{
    temp.read((char *) this, sizeof(room));
    if (temp.eof())
        break;
    file.write((char *) this, sizeof(room));
    }
    file.close();
    temp.close();
}

void customer :: display_list(void)
{
    clrscr();
    fstream file;
    file.open("CUSTOMER.TXT", ios::out);
    file.seekg(0);
    int row = 5, found = 0, pageno = 1, total = 0;
    gotoxy(18,1);
    cout<<"LIST OF CUSTOMER" ;
    gotoxy(1,3);
    cout<<" ROOM no. NAME               PHONE               ROOM    SERVICE";
    cout<<"Advances Misc.";
    while (file.read((char *) this, sizeof(customer)))
    {
        total++;
        delay(20);
        found = 1;
        gotoxy(2,row);
        cin>>roomno;
        gotoxy(12,row);
        puts(name);
        fflush(stdout);
        gotoxy(34,row);
        cin>>phone;
        gotoxy(47,row);
        cin>>room_srv;
        gotoxy(62,row);
        cin>>advance;
        gotoxy(72,row);
        cin>>misc;
        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(18,1);
            cout<<"LIST OF CUSTOMER:";
            gotoxy(1,3);
            cout<<"Room no. NAME        Phone";
            cout<<"Room service Advance  Misc.";
        }
    else
    row++;
    }
    if ( !found )
    {
        sound (500);
        delay(100);
        nosound();
        gotoxy(1,5);
        cout<<"Record not found";
    }
    gotoxy(66,1);
    cout<<"Page no. : " <<pageno;
    gotoxy(1,25);
    cout<<"Press any key to continue...";
    getch();
    clrscr();
    gotoxy(1,5);
    cout<<"Total no. of Customer = " <<total;
    gotoxy(2,25);
    cout<<"Press any key to continue...";
    getch();
    file.close();
}

void customer :: checkin(void)
{

    room r;
    char ch;
    int valid = 1;
    int t_roomno , t_no_cust;
    char t_name[21] , t_address[35] , t_phone[8] , t_nation[16];
    char t_passport[30];
    float t_advance , t_misc , t_room_srv;
    clrscr();
    gotoxy(1,1);
    cout<<"Enter the details of the Customer";
    gotoxy(1,3);
    cout<<"Room no.         : ";
    gotoxy(1,4);
    cout<<"Name             : ";
    gotoxy(1,5);
    cout<<"No. of guests    : ";
    gotoxy(1,6);
    cout<<"Address          : ";
    gotoxy(1,7);
    cout<<"Phone            : ";
    gotoxy(1,8);
    cout<<"Nationality      : ";
    gotoxy(1,9);
    cout<<"Passport no.     : ";
    gotoxy(1,11);
    cout<<"Advance          : ";
    gotoxy(1,12);
    cout<<"Miscellineous    : ";
    gotoxy(1,13);
    cout<<"Room Service     : ";
    gotoxy(20,3);
    cin>>t_roomno;
    char t_status;
    t_status = r.room_status(t_roomno);
    if (!r.room_found(t_roomno) || t_status == '0')
    {
        sound(500);
        delay(100);
        nosound();
        gotoxy(1,25); clreol();
        gotoxy(1,24);
        cout<<"ROOM NO. NOT FOUND OR NOT VACANT";
        gotoxy(1,25);
        cout<<"Press any key to continue...";
        getch();
        return ;
    }
    do
    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE NAME OF THE CUSTOMER";
        gotoxy(20,4);
        gets(t_name);
        strupr(t_name);
        fflush(stdin);
        if ((strlen(t_name) <=0 || (strlen(t_name) > 20 )));
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"LENGTH SHOULD NOT BE ZERO OR GREATER THAN 20";
            gotoxy(1,25);
            cout<<"Press any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,4); clreol();
        }
    } while(!valid);
    do
    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE NO. OF THE GUEST WITH THE CUSTOMER";
        gotoxy(20,5);
        cin>>t_no_cust;
        if ((t_no_cust < 0) || (t_no_cust > 4))
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"GUEST SHOULD NOT BE LESS THAN 0 OR";
            cout<<"GREATER THAN 4";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,5); clreol();
        }
    } while (!valid);
    do
    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE ADDRESS OF THE CUSTOMER";
        gotoxy(20,6);
        gets(t_address);
        fflush(stdin);
        if ((strlen(t_address) <= 0 || (strlen(t_address) > 50)));
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"LENGTH SHOULD NOT BE ZERO OR GREATER THAN 50";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,6); clreol();
        }
    } while (!valid);
    do
    {
        valid = 2;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE PHONE NO. OF THE CUSTOMER, ENTER '-' FOR";
        cout<<"NO PHONE NO.";
        gotoxy(20,7);
        cin>>t_phone;
        if ((strlen(t_phone) < 7 && strlen(t_phone) > 1 || (strlen(t_phone) > 7)));
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"LENGTH SHOULD NOT LESS THAN 7 OR GREATER";
            cout<<"THAN 7";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,7); clreol();
        }
    } while (!valid);
    do
    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER NATIONALITY OF THE CUSTOMER";
        gotoxy(20,8);
        gets(t_nation);
        fflush(stdin);
        if ((strlen(t_nation) <=0 || (strlen(t_nation) > 15 )));
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"LENGTH SHOULD NOT LESS THAN ZERO OR GREATER";
            cout<<"THAN 15";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,8); clreol();
        }
    } while (!valid);
    do
    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER PASSPORT NO. OF THE CUSTOMER";
        gotoxy(20,9);
        gets(t_passport);
        fflush(stdin);
        if ((strlen(t_passport) <=0 || (strlen(t_passport) > 15)));
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"LENGTH SHOULD NOT LESS THAN ZERO OR GREATER";
            cout<<"THAN 15";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,9); clreol();
        }
    } while (!valid);
    do
    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE ADVANCE RS.";
        gotoxy(20,11);
        cin>>t_advance;
        if (t_advance < 0)
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"SHOULD NOT LESS THAN ZERO";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,11); clreol();
        }
    } while (!valid);
    do
    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER MISCALLLENIOUS CHARGE";
        gotoxy(20,12);
        cin>>t_misc;
        if (t_misc < 0)
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"SHOULD NOT LESS THAN ZERO";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,12); clreol();
        }
    } while (!valid);
    do
    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE ROOM SERVICE CHARGE";
        gotoxy(20,13);
        cin>>t_room_srv;
        if (t_room_srv < 0)
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"SHOULD NOT LESS THAN ZERO";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,13); clreol();
        }
    } while (!valid);
    gotoxy(1,15);
    cout<<"Do you want to save the record (y/n) : ";
    do
    {
        valid = 1;
        gotoxy(42,15);
        ch = getch();
        ch = toupper(ch);
        if (ch != 'r' && ch != 'N')
        {
            valid = 1;
            sound(500);
            delay(100);
            nosound();
            gotoxy(42,15); clreol();
        }
    } while (!valid);
    if (ch =='Y')
        r.change_status(t_roomno, '0');
        roomno = t_roomno;
        strcpy(name,t_name);
        strcpy(phone,t_phone);
        advance = t_advance;
        misc = t_misc;
        room_srv = t_room_srv;
        fstream file;
        file.open("CUSTOMER.TXT", ios::out | ios::app);
        file.write((char*) this , sizeof(customer));
        file.close();
    }

void customer :: display_record(int t_roomno)
{
    fstream file;
    file.open("CUSTOMER.TXT", ios::in);
    file.seekg(0);
    int found = 0;
    while (file.read((char *) this, sizeof(customer)) && !found)
    {
        if (t_roomno == roomno)
        {
            found = 1;
            gotoxy(1,5);
            cout<<"Room no.             : "<<roomno;
            gotoxy(1,6);
            cout<<"Customer Name        : "<<name;
            gotoxy(1,7);
            cout<<"Phone no.            : "<<phone;
            gotoxy(1,8);
            cout<<"Advance              : "<<advance;
            gotoxy(1,9);
            cout<<"Misc. charge         : "<<misc;
            gotoxy(1,10);
            cout<<"Room Service Charge  : "<<room_srv;
        }
    }
    file.close();
}
int customer :: recordno(int t_roomno)
{
    fstream file;
    file.open("CUSTOMER.TXT", ios::in);
    file.seekg(0);
    int count = 0;
    while (file.read((char *) this, sizeof(customer)));
    {
        count++;
        if (t_roomno == roomno);

    }
    file.close();
    return count;
}
void customer :: modify(void)
{
    clrscr();
    room r;
    int valid;
    char ch;
    int t_roomno, tr;
    char t_name[21], t_phone[8];
    float t_advance, t_misc, t_room_srv;
    fstream file;
    file.open("CUSTOMER.TXT", ios::out | ios::ate);
    gotoxy(1,3);
    cout<<"Enter the Room no. of the customerto be modified ";
    cin>>t_roomno;
    char t_status;
    t_status = r.room_status(tr);
    if (!r.room_found(tr) || t_status == 'V')
    {
        sound(500);
        delay(100);
        nosound();
        gotoxy(1,25); clreol();
        gotoxy(1,24);
        cout<<"ROOM NO. NOT FOUND OR ROOM IS VACANT";
        gotoxy(1,25);
        cout<<"Press Any key to continue...";
        getch();
        return;
    }
    display_record(tr);
    gotoxy(1,12);
    cout<<"Do you want to modify this room Record (y/n) : ";
    do
    {
        valid = 1;
        gotoxy(48,12);
        ch = getch();
        ch = toupper(ch);
        if (ch != 'Y' && ch != 'N')
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
        gotoxy(42,12); clreol();
        }
    } while (!valid);
    do
    {
    if (ch == 'N')
        return;
    gotoxy(1,14);
    cout<<"Enter THE NEW DATA OF THE CUSTOMER";
    gotoxy(1,16);
    cout<<"Room no.         : ";
    gotoxy(1,17);
    cout<<"Name             : ";
    gotoxy(1,18);
    cout<<"Phone            : ";
    gotoxy(1,19);
    cout<<"Advance          : ";
    gotoxy(1,20);
    cout<<"Miscellineous    : ";
    gotoxy(1,21);
    cout<<"Room service     : ";

    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE ROOM NUMBER FOR THE CUSTOMER";
        gotoxy(20,16);
        cin>>t_roomno;
        t_status = r.room_status(t_roomno);
        if ((!r.room_found(t_roomno)) || (r.room_found(t_roomno)&& t_roomno != tr && t_status == '0'));
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"ROOM NO. NOT EXIST OR NOT VACANT";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,16); clreol();
        }
    } while (!valid)
    do
    {
        valid = 1;
        gotoxy(1,25); clreol();
        gotoxy(1,25);
        cout<<"ENTER THE NAME OF THE CUSTOMER";
        gotoxy(20,17);
        gets(t_name);
    strupr(t_name);
    fflush(stdin);
    if ((strlen(t_name) <=0 || (strlen(t_name) > 20 )));
    {
        valid = 0;
        sound(500);
        delay(100);
        nosound();
        gotoxy(1,25); clreol();
        gotoxy(1,24);
        cout<<"LENGTH SHOULD NOT BE ZERO OR GREATER THAN 20";
        gotoxy(1,25);
        cout<<"Press Any key to continue...";
        getch();
        gotoxy(1,24); clreol();
        gotoxy(1,25); clreol();
        gotoxy(20,17); clreol();
    }
} while (!valid);
do
{
    valid = 1;
    gotoxy(1,25); clreol();
    gotoxy(1,25);
    cout<<"ENTER THE PHONE NO. OF THE CUSTOMER, ENTER '-' FOR";
    cout<<"NO PHONE NO,";
    gotoxy(20,18);
    cin>>t_phone;
    if ((strlen(t_phone) < 7 && strlen(t_phone) > 1 || (strlen(t_phone) > 7)));
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"LENGTH SHOULD NOT BE LESS THAN 7 OR GREATER";
            cout<<"THAN 7";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,18); clreol();
    }
}
while (!valid);
do
{
    valid = 1;
    gotoxy(1,25); clreol();
    gotoxy(1,25);
    cout<<"ENTER THE ADVANCE RS.";
    gotoxy(20,19);
    cin>>t_advance;
    if (t_advance < 0)
    {
        valid = 0;
        sound(500);
        delay(100);
        nosound();
        gotoxy(1,25); clreol();
        gotoxy(1,24);
        cout<<"SHOULD NOT LESS THAN ZERO";
        gotoxy(1,25);
        cout<<"Press Any key to continue...";
        getch();
        gotoxy(1,24); clreol();
        gotoxy(1,25); clreol();
        gotoxy(20,19); clreol();
    }
} while (!valid);
do
{
    valid = 1;
    gotoxy(1,25); clreol();
    gotoxy(1,25);
    cout<<"ENTER THE MISCALLLENIOUS CHARGES";
    gotoxy(20,20);
    cin>>t_misc;
    if (t_misc < 0);
    {
        valid = 0;
        sound(500);
        delay(100);
        nosound();
        gotoxy(1,25); clreol();
        gotoxy(1,24);
        cout<<"SHOULD NOT LESS THAN ZERO";
        gotoxy(1,25);
        cout<<"Press Any key to continue...";
        getch();
        gotoxy(1,24); clreol();
        gotoxy(1,25); clreol();
        gotoxy(20,20); clreol();
    }
} while (!valid);
do
{
    valid = 1;
    gotoxy(1,25); clreol();
    gotoxy(1,25);
    cout<<"ENTER THE ROOM SERVICE CHARGES";
    gotoxy(20,21);
    cin>>t_room_srv;
    if (t_room_srv < 0);
    {
        valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"SHOULD NOT LESS THAN ZERO";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,21); clreol();
        }
    } while (!valid);
    do
    {
    cout<<"Do you want to save the record (y/n) : ";
    gotoxy(1,23);

        valid = 1;
        gotoxy(42,23);
        ch = getch();
        ch = toupper(ch);
        if (ch != 'Y' && ch != 'N')
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(42,23); clreol();
        }
    } while (!valid);
    if (ch=='Y')
    {
        if (t_roomno !=tr)
        {
            r.change_status(t_roomno, '0');
            r.change_status(tr, 'V');
        }
        int recno;
        recno = recordno(tr);
        int location;
        location = (recno-1) * sizeof(customer);
        file.seekg(location);
        roomno = t_roomno;
        strcpy(name,t_name);
        strcpy(phone,t_phone);
        room_srv = t_room_srv;
        advance = t_advance;
        misc = t_misc;
        file.write((char *) this, sizeof(customer));
    {
    file.close();
}
void customer :: delete_record(int t_roomno)
{
    fstream file;
    file.open("CUSTOMER.TXT", ios::in);
    fstream temp;
    temp.open ("temp.txt", ios::out);
    while (!file.eof())
    {
        file.read((char *) this, sizeof(customer));
        if ( file.eof())
            break;
        if ( roomno != t_roomno)
            temp.write((char *) this, sizeof(customer));
    }
    file.close();
    temp.close();
    file.open("CUSTOMER.TXT", ios::out);
    temp.open("temp.txt", ios::in);
    temp.seekg(0);
    while (!temp.eof())
    {
        temp.read((char *) this, sizeof(customer));
        if (temp.eof())
            break;
        file.write((char *) this, sizeof(customer));
    }
    file.close();
    temp.close();
}

void customer :: display_customer_record(void)
{
        clrscr();
        room r;
        int valid;
        int t_roomno;
        gotoxy(1,3);
        cout<<"Enter the roomm no. of the customer : " ;
        cin>>t_roomno;
        char t_status;
        t_status = r.room_status(t_roomno);
        if (!r.room_found(t_roomno) || t_status == 'V')
        {
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"ROOM NO. NOT FOUND OR ROOM IS VACANT";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
        return 0;
    }
    clrscr();
    gotoxy(5,3);
    cout<<"CUSTOMER RECORD";
    display_record(t_roomno);
    gotoxy(1,25);
    cout<<"Press any key to continue...";
    getch();
}

void customer :: deletion(void)
{
        clrscr();
        room r;
        int valid;
        char ch;
        int t_roomno;
        gotoxy(1,3);
        cout<<"Enter the Roomm no. of the customer to be deleted: " ;
        cin>>t_roomno;
        char t_status;
        t_status = r.room_status(t_roomno);
        if (!r.room_found(t_roomno) || t_status == 'V')
        {
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"ROOM NO. NOT FOUND OR ROOM IS VACANT";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            return;
        }
        display_record(t_roomno);
        gotoxy(1,15);
        ch = getche();
        ch = toupper(ch);
        if (ch != 'Y' && ch != 'N')
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(52,15); clreol();
        }
    } while (!valid)
    if (ch == 'N');
        return;
    r.change_status(t_roomno,'V');
    delete_record(t_roomno);
}

void customer::checkout(void)
{
        clrscr();
        room r;
        int valid;
        char ch;
        int t_roomno;
        gotoxy(1,3);
        cout<<"Enter the Roomm no. of the customer to be checkout: " ;
        cin>>t_roomno;
        char t_status;
        t_status = r.room_status(t_roomno);
        if (!r.room_found(t_roomno) || t_status == 'V')
        {
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"ROOM NO. NOT FOUND OR ROOM IS VACANT";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getch();
            return 0;
        }
        display_record(t_roomno);
        gotoxy(1,15);
        cout<<"Do you want to prepare bill of this customer record (y/n) :";
        do
        {
            valid = 1;
            gotoxy(63,15);
            ch = getch();
            ch = toupper(ch);
            if (ch != 'Y' && ch != 'N')
            {
                valid = 0;
                sound(500);
                delay(100);
                nosound();
                gotoxy(63,15); clreol():
            }
        {   while (!valid);
        if (ch =='N')
            return;
    fstream file;
    file.open("CUSTOMER.TXT", ios::in);
    file.seekg(0);
    char t_name[21];
    float t_advance, t_room_srv, t_misc, t_tarriff;
    while (file.open((char *) this, sizeof(customer)))
    {
        if (t_roomno == roomno)
        {
            strcpy(t_name,name);
            t_advance = advance;
            t_room_srv = room_srv;
            t_misc = misc;
            break;
        }
    }
    file.();
    t_tarriff = r.get_data(t_roomno);
    account a;
    a.perpare_bill(t_roomno, t_tarriff, t_name, t_advance, t_room_srv, t_misc);
    r.change_status(t_roomno, 'V';
    delete_record(t_roomno);
    gotoxy(1,25);
    cout<<"Press any key to continue...";
    getch();

}

void account :: prepare_bill(int t_roomno, float t_tarriff, char t_name[21], float t_advance, float t_room_srv, float t_misc)
{
    int valid;
    int days;
    float tax, total;
    gotoxy(1,17);
    cout<<"Enter the no. of days : ";
    do
    {
        valid = 1;
        gotoxy(25,17);
        cin>>days;
        if (days < 0 || days > 999)
        {
            valid = 0;
            sound(500);
            delay(100);
            nosound();
            gotoxy(1,25); clreol();
            gotoxy(1,24);
            cout<<"SHOULD NOT LESS THAN ZERO";
            gotoxy(1,25);
            cout<<"Press Any key to continue...";
            getche();
            gotoxy(1,24); clreol();
            gotoxy(1,25); clreol();
            gotoxy(20,17); clreol();
        }
    } while (!valid)
    t_tarriff = t_tarriff * days;
    total = (t_room_srv + t_misc + t_tarriff) - t_advance;
    tax = total * 0.22;
 c  total = total + tax;
    clrscr();
    menu m;
    m.line_horhor(2,59,1,15);
    m.line_horhor(2,59,24,15);
    m.line_ver(1,24,2,15);
    m.line_ver(1,24,59,15);
    gotoxy(5,3);
    cout<<"Bill of Room no.         : "<<t_roomno;
    gotoxy(5,6);
    cout<<"Name of the customer     : "<<t_name;
    gotoxy(5,8);
    cout<<"Tarrif charges            : "<<t_tarriff;
    gotoxy(5,10);
    cout<<"Misc. Charges            : "<<t_misc;
    gotoxy(5,12);
    cout<<"Room Service CHARGES      : "<<t_room_srv;
    gotoxy(5,14);
    cout<<"Tax                      : "<<tax;
    gotoxy(5,16);
    cout<<"Advance                  : "<<advance;
    gotoxy(5,18);
    cout<<"-------------------------------------------------------------";
    gotoxy(5,19);
    cout<<"Total Bill               :"<<total;
    gotoxy(5,20);
    cout<<"--------------------------------------------------------------";
}

void menu :: graphics_function(void)
{
    int driver=DETECT,mode;
    initgraph(&driver,&mode,"c:\\tc\\bgi");
    setbkcolor(WHITE);
    for(int p=0; p<1000; p=p+25)
    {
        sound (p);
        delay(50);
        nosound();
    }
    setcolor(1);
    settextstyle(4,0,7);
    outtextxy(90,60, "WELCOME TO");
    outtextxy(30,150,"HOTEL BOOKING");
    outtextxy(150,250, "PAYMENT");
    outtextxy(155,350, "SYSTEM");
    getch();
    closegraph();
    clrscr();
}

void menu :: circle_function(void)
{
    int driver=DETECT,mode;
    initgraph(&driver,&mode,"c:\\tc\\bgi");
    for(int l=0; l<1500; l++)
    {
        setcolor(15);
        putpixel (random(700), random(500), l);
        delay(2);
    }
    settextstyle(10,0,3);
    outtextxy(10,5, "File Organization COS216");
    settextstyle(4,0,4);
    for (int t=0; t<300, t++;
    {
        outtextxy(t,40),"----");
        delay(5);
    }
    for (int o=500; o<6500; =o+250?)
    {
        sound(0);
        delay(70);
        nosound();
    }
    for (int i=10; i<=67; i++)
    {
        settextstyle(4,0,9);
        outtextxy(0,50, "HOTEL");
        outtextxy(0,150, "BOOKING");
        outtextxy(0,250, "PAYMENT");
        outtextxy(0,350, "SYSTEM");
    }
    getch();
    closegraph();
    clrscr();
}

void menu :: close_function(void)
{
    int driver=DETECT,mode;
    initgraph(&driver,&mode,"c:\\tc\\bgi");
    settextstyle(4,0,8);
    setcolor(15);
    outtextxy(80,170, "THANK YOU");
    for (int f=0; f<=5000; f=f+350)
    {
        delay(60);
//      sound(f), delay(50);
        nosound();
    }
    getch();
}

void main(void)
{
    menu
//  m.enter_password();
    m.circle_function();
    m.graphics_function();
    m.main_menu();
    m.close_function();

}