This is a simple hotel management program of C++. Below real code is given of the program. Draw a flowchart and block diagram of the program. Snaps of Flow chart and block diagram should be clear in reading. Point out any major mistake in the end in code if found. In case to run the program, Dev C++ is preferred after deleting comments from code. Thanks for co-operation.

#include
#include
#include
#include
#include
#include

using namespace std;

//START OF CLASS

class hotel
{

int room_no;
char name[30];
char address[50];
char phone[10];

public:

void main_menu(); //to display the main menu
void add(); //to book a room
void display(); //to display the customer record
void rooms(); //to display allotted 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 bill(int); //for the bill of a record
};
//END OF CLASS

//FOR DISPLAYING MAIN MENU

void hotel::main_menu()
{

int choice;
while(choice!=5)
{

system("cls");
cout<>
cout<"ttt simple="" hotel="" management="">
cout<"ttt *="" main="" menu="">
cout<>
cout<"tt1.book a="">
cout<"tt2.customer>
cout<"tt3.rooms>
cout<"tt4.edit>
cout<>
cout<"tttenter 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<"tttwrong>
cout<"ttpress any="" key="" to="">
getch();

}

}

}

}

//END OF MENU FUNCTION

//FUNCTION FOR BOOKING OF ROOM

void hotel::add()
{

system("cls");
int r,flag;
ofstream fout("Record.dat",ios::app);

cout<" enter="" customer="">
cout<">
cout<" room="" no:="">
cout<" total="" no.="" of="" rooms="" -="">
cout<" ordinary="" rooms="" from="" 1="" -="">
cout<" luxuary="" rooms="" from="" 31="" -="">
cout<" royal="" rooms="" from="" 46="" -="">
cout <" enter="" the="" room="" no.="" you="" want="" to="" stay="" in="" :-=""><>
cin>>r;

flag=check(r);

if(flag)
cout<" sorry..!!!room="" is="" already="">

else
{

room_no=r;
cout<" name:="">
cin>>name;
cout<" address:="">
cin>>address;
cout<" phone="" no:="">
cin>>phone;

fout.write((char*)this,sizeof(hotel));
cout<" room="" is="">

}

cout<" press="" any="" key="" to="">

getch();
fout.close();

}

//END OF BOOKING FUNCTION

//FUNCTION FOR DISPLAYING A PURTICULAR CUSTOMER`S RECORD

void hotel::display()
{

system("cls");

ifstream fin("Record.dat",ios::in);
int r,flag;

cout<" enter="" room="" no.="" for="" a="" particular="" customer`s="" details="" :-=""><>
cin>>r;

while(!fin.eof())
{

fin.read((char*)this,sizeof(hotel));
if(room_no==r)
{

system("cls");
cout<" cusromer="">
cout<">
cout<" room="" no:=""><>
cout<" name:=""><>
cout<" address:=""><>
cout<" phone="" no:=""><>
flag=1;
break;

}

}

if(flag==0)
cout<" sorry="" room="" no.="" not="" found="" or="">
cout<" press="" any="" key="" to="">

getch();
fin.close();
}

//END OF DISPLAY FUNCTION

//FUNCTION TO DISPLAY ALL ROOMS OCCUPIED

void hotel::rooms()
{

system("cls");

ifstream fin("Record.dat",ios::in);
cout<"tt list="" of="" rooms="">
cout<"tt>
cout<" room="" no.amettaddressttttphone="">

while(!fin.eof())
{

fin.read((char*)this,sizeof(hotel));
cout<"><><><>
cout<><><><>

}

cout<"ttpress any="" key="" to="">
getch();
fin.close();

}

//FUNCTION FOR EDITING RECORDS AND FOR BILL

void hotel::edit()
{

system("cls");

int choice,r;
cout<" edit="">
cout<">
cout<" 1.modify="" customer="">
cout<" 2.delete="" customer="">
cout<" 3.="" bill="" of="">
cout<" enter="" your="" choice:="">

cin>>choice;
system("cls");

cout<" enter="" room="" no:="" "="">
cin>>r;

switch(choice)
{

case 1: modify(r);
break;

case 2: delete_rec(r);
break;

case 3: bill(r);
break;

default: cout<" wrong="">

}
cout<" press="" any="" key="" to="">

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);

}

//FUNCTION TO MODIFY CUSTOMERS RECORD

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<" enter="" new="">
cout<">
cout<" name:="">
cin>>name;
cout<" address:="">
cin>>address;
cout<" phone="" no:="">
cin>>phone;
file.seekg(pos);
file. Write((char*)this,sizeof(hotel));
cout<" record="" is="">
flag=1;
break;

}

}

if(flag==0)
cout<" sorry="" room="" no.="" not="" found="" or="">
file.close();

}

//END OF MODIFY FUNCTION

//FUNCTION FOR DELETING RECORD

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.read())
{

fin.read((char*)this,sizeof(hotel));
if(room_no==r)

{

cout<" name:=""><>
cout<" address:=""><>
cout<" pone="" no:=""><>
cout<" 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<" sorry="" room="" no.="" not="" found="" or="">

else
{

remove("Record.dat");
rename("temp.dat","Record.dat");

}

}

//END OF DELETE FUNCTION

//FUNCTION FOR CUSTOMER`S BILL

void hotel::bill(int r)
{

hotel h1;
ifstream f1;
f1.open("record.dat",ios::in|ios::binary);

if(!f1)
cout<"cannot>

else
{

f1.read((char*)&h1,sizeof (hotel));
while(f1)

{

f1.read((char*)&h1,sizeof(hotel));

}

if (h1.room_no == r)
{

if(h1.room_no>=1&&h1.room_no<>
cout<"your bill="">

else if (h1.room_no>=35&&h1.room_no<>
cout<"your bill="5000"">

else
cout<"your bill="">

}

else
{ cout<"room no.="" not="">

}

f1.close();
getch();

}

//END OF BILLING FUNCTION

//START OF MAIN PROGARM

int main()
{

hotel h;

system("cls");

cout<>
cout<"tt* hotel="" management="" project="">
cout<>
cout<"ttdeveloped>
cout<"t g.="">
cout<"ttttpress any="" key="" to="">

getch();

h.main_menu();
return 0;
}

//END OF MAIN PROGRAM