Hotel Management in C++

#include<iostream>
#include<fstream>
#include<conio.h>
#include<windows.h>
using namespace std;
class hotel
{
int room_no;
char name[30];
char address[50];
char phone[10];
public:
void main_menu(); //to dispay the main menu
void add(); //to book a room
void display(); //to display the customer record
void rooms(); //to display alloted rooms
void edit(); //to edit the customer record
int check(int); //to check room status
void modify(int); //to modify the record
void delete_rec(int); //to delete the record
};
void hotel::main_menu()
{
int choice;
while(choice!=5)
{
cout<<"\n\t-----------------------";
cout<<"\n\t MAIN MENU ";
cout<<"\n\t------------------------";
cout<<"\n\t1.Book A Room";
cout<<"\n\t2.Customer Record";
cout<<"\n\t3.Rooms Allotted";cout<<"\n\t4.Edit Record";
cout<<"\n\t5.Exit";
cout<<"\n\tEnter Your Choice: ";
cin>>choice;
switch(choice)
{
case 1: add();
break;
case 2: display();
break;
case 3: rooms();
break;
case 4: edit();
break;
case 5: break;
default:
{
cout<<"\ninvalid choice...!";
cout<<"\nPress any key to continue...!";
getch();
}}
}}

void hotel::add()
{
int r,flag;
ofstream fout("Record.dat",ios::app);
cout<<"\n Enter Customer Detalis";
cout<<"\n ----------------------";
cout<<"\n\n Room no: ";
cin>>r;
flag=check(r);
if(flag)
cout<<"\n Sorry..!Room is already booked";
else
{
room_no=r;
cout<<" Name: ";
gets(name);
cout<<" Address: ";
gets(address);
cout<<" Phone No: ";
gets(phone);
fout.write((char*)this,sizeof(hotel));
cout<<"\n Room is booked...!";
}
cout<<"\n Press any key to continue...!";
getch();
fout.close();
}void hotel::display()
{ifstream fin("Record.dat",ios::in);
int r,flag;
cout<<"\n Enter room no: ";
cin>>r;
while(!fin.eof())
{
fin.read((char*)this,sizeof(hotel));
if(room_no==r)
{
cout<<"\n Cusromer Details";
cout<<"\n ----------------";
cout<<"\n\n Room no: "<<room_no;
cout<<"\n Name: "<<name;
cout<<"\n Address: "<<address;
cout<<"\n Phone no: "<<phone;
flag=1;
break;
}
}
if(flag==0)
cout<<"\n Sorry Room no. not found or vacant...!";
cout<<"\n\n Press any key to continue....!";
getch();
fin.close();
}
void hotel::rooms()
{
ifstream fin("Record.dat",ios::in);
cout<<"\n\t\t\t List Of Rooms Allotted";
cout<<"\n\t\t\t ----------------------";
cout<<"\n\n Room No.\tName\t\tAddress\t\t\t\tPhone No.\n";
while(!fin.eof())
{
fin.read((char*)this,sizeof(hotel));
cout<<"\n\n "<<room_no<<"\t\t"<<name;
cout<<"\t\t"<<address<<"\t\t"<<phone;
}
cout<<"\n\n\n\t\t\tPress any key to continue...!";
getch();
fin.close();
}
void hotel::edit()
{
int choice,r;
cout<<"\n EDIT MENU";
cout<<"\n ---------";
cout<<"\n\n 1.Modify Customer Record";
cout<<"\n 2.Delete Customer Record";
cout<<"\n Enter your choice: ";
cin>>choice;
cout<<"\n Enter room no: " ;
cin>>r;
switch(choice)
{
case 1: modify(r);
break;
case 2: delete_rec(r);
break;
default: cout<<"\n Wrong Choice...!";
}
cout<<"\n Press any key to continue...!";
getch();
}
int hotel::check(int r)
{
int flag=0;
ifstream fin("Record.dat",ios::in);
while(!fin.eof())
{
fin.read((char*)this,sizeof(hotel));
if(room_no==r)
{
flag=1;
break;
}
}fin.close();
return(flag);
}
void hotel::modify(int r)
{
long pos,flag=0;
fstream file("Record.dat",ios::in|ios::out|ios::binary);
while(!file.eof())
{
pos=file.tellg();
file.read((char*)this,sizeof(hotel));
if(room_no==r)
{
cout<<"\n Enter New Details";
cout<<"\n -----------------";
cout<<"\n Name: ";
gets(name);
cout<<" Address: ";
gets(address);
cout<<" Phone no: ";
gets(phone);
file.seekg(pos);
file.write((char*)this,sizeof(hotel));
cout<<"\n Record is modified....!";
flag=1;
break;
}}
if(flag==0)
cout<<"\n Sorry Room no. not found or vacant...!";
file.close();
}
void hotel::delete_rec(int r)
{
int flag=0;
char ch;
ifstream fin("Record.dat",ios::in);
ofstream fout("temp.dat",ios::out);
while(!fin.eof())
{
fin.read((char*)this,sizeof(hotel));
if(room_no==r)
{
cout<<"\n Name: "<<name;
cout<<"\n Address: "<<address;
cout<<"\n Pone No: "<<phone;
cout<<"\n\n Do you want to delete this record(y/n): ";
cin>>ch;
if(ch=='n')
fout.write((char*)this,sizeof(hotel));
flag=1;
}
else
fout.write((char*)this,sizeof(hotel));
}
fin.close();
fout.close();
if(flag==0)
cout<<"\n Sorry room no. not found or vacant...!";
else
{
remove("Record.dat");
rename("temp.dat","Record.dat");
}
}
main()
{
hotel h;
system("color 3f");
cout<<"\n\t-----------------------------";
cout<<"\n\t* HOTEL MANAGEMENT PROJECT *";
cout<<"\n\t-----------------------------";
cout<<"\n\n\tMade By:";
cout<<"\n\n\tSubmitted To:";
cout<<"\t";
cout<<"\n\n\tPress any key to continue...!";
getch();
h.main_menu();
}