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main.cpp
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main.cpp
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#include <bits/stdc++.h>
using namespace std;
//base class
class client
{
public:
//base class data members
static int c_id_count;
int cost_cnt;
char c_type;
//base class member functions
//using csv file to store & check the user data
//virtual function for polymorphism
virtual void check()
{
//Here searching if a client has his / her account
fstream fin;
fin.open("client.csv", ios::in);
int target_phn,phn,count = 0;
cout << "Enter the phone number of the client to display details: ";
cin >> target_phn;
//using vector to get a line at a time
vector<string> row;
string line, word;
while (fin >> line) {
row.clear();
stringstream s(line);
//get the data splitting by comma from the line
while (getline(s,word,',')) {
row.push_back(word);
}
//changing the string input to int
phn = atoi(row[2].c_str());
if (target_phn == phn) {
//printing the client data
count = 1;
cout << "Client ID: " << row[0] << "\n";
cout << "Name: " << row[1] << "\n";
cout << "Phone No: " << row[2] << "\n";
cout << "Address: " << row[3] << "\n";
cout << "NID: " << row[4] << "\n";
break;
}
}
//if the client isn't registered
if (count == 0)
cout << "Record not found\n";
}
// virtual function for polymorphism
virtual int update()
{
fstream fout;
//open file to append new client data
fout.open("client.csv", ios::out | ios::app);
int c_id;
//getting the client informations
string c_name;
string c_phone_no;
string c_address;
string c_nid;
cout<<"Enter Client ID:";cin>>c_id;
cout<<endl<<"Enter Client Name:";cin>>c_name;
cout<<endl<<"Enter Client Phone No:";cin>>c_phone_no;
cout<<endl<<"Enter Client Address:";cin>>c_address;
cout<<endl<<"Enter Client NID:";cin>>c_nid;
//printing the client details in csv file
fout << c_id << ","
<< c_name << ","
<< c_phone_no << ","
<< c_address << ","
<< c_nid << "\n";
fout.close();
}
/*
we can also get the informations using constructor
client(string c_name,string c_phone_no,string c_address,string c_nid,char c_type)
{
c_id_count++; c_id=c_id_count;
this->c_name=c_name; this->c_phone_no=c_phone_no; this->c_address=c_address; this->c_nid=c_nid; this->c_type=c_type;
}
*/
};
//derived class of the base class client
//virtually iherited client to solve diamond problem
class client_hotelroom:virtual public client
{
public:
//extented check function to check if a hotel room is vacant
void check()
{
//opening txt file to read
ifstream inf("hotelroom.txt");
//if the text file is not available
if(!inf) cout<<endl<<"Unable to open hotelroom file"<<endl;
int room_id; string room_type; string room_book;
cout<<endl<<"hotelrooms to book:"<<endl;
//reading the whole file to print available hotel rooms
while(!inf.eof())
{
inf>>room_id>>room_type>>room_book;
if(room_book=="NULL")
cout<<room_id<<" "<<room_type<<endl;
}
//closing the file
inf.close();
}
//extented update funtion to book a hotel room
int update()
{
//taking the information to book a definite room
int target_room_id,c_id;
cout<<"Please enter the required room id:";
cin>>target_room_id;
cout<<"Please enter the client id:";
cin>>c_id;
//changing the int c_id to string client_id to compare
string client_id;
stringstream ss;
ss << c_id;
client_id = ss.str();
//opening the text file to read and append
ifstream inf("hotelroom.txt");
ofstream outf("hotelroom1.txt");
if(!inf) cout<<endl<<"Unable to open hotelroom file"<<endl;
int room_id; string room_type; string room_book;
//taking all the data to book the required room
while(!inf.eof())
{
inf>>room_id>>room_type>>room_book;
if(room_id==target_room_id)
{
//using the base class data member to calculate client's cost
cost_cnt+=1000;
cout<<room_id<<" "<<room_type<<endl;
//updating the room id with client_id to make it booked
outf<<room_id<<" "<<room_type<<" "<<client_id<<endl;
}
else
{
//if it isn't the required room then simply rewriting it
outf<<room_id<<" "<<room_type<<" "<<room_book<<endl;
}
}
//closing the two files to save update
outf.close();
inf.close();
//deleting previous text file then renaming the updated textfile to replace the previous one
remove("hotelroom.txt");
rename("hotelroom1.txt","hotelroom.txt");
//return the cost of the client
return cost_cnt;
}
//checkout a booked room to make it available again
void checkout()
{
//getting necessary infos and changing to string
int c_id;
cout<<"Please enter the client id:";
cin>>c_id;
string client_id;
stringstream ss;
ss << c_id;
client_id = ss.str();
//read & write the text file
ifstream inf("hotelroom.txt");
ofstream outf("hotelroom1.txt");
if(!inf) cout<<endl<<"Unable to open hotelroom file"<<endl;
int room_id; string room_type; string room_book;
//updating the rooms which the client hold to make it available
while(true)
{
inf>>room_id>>room_type>>room_book;
if(inf.eof()) break;
if(room_book==client_id)
{
cout<<room_id<<" "<<room_type<<endl;
outf<<room_id<<" "<<room_type<<" "<<"NULL"<<endl;
}
else
{
outf<<room_id<<" "<<room_type<<" "<<room_book<<endl;
}
}
//closing the file and replacing the previous file
outf.close();
inf.close();
remove("hotelroom.txt");
rename("hotelroom1.txt","hotelroom.txt");
}
//virtual function for polymorphism in derived class cost
virtual void display_cost(){};
};
//client's derived class to book the convention hall
class client_conventionhall:virtual public client
{
public:
//check function to check if the hall is empty in the required time
void check()
{
//opening the text file and taking necessary informations
ifstream inf("conventionhall.txt");
if(!inf) cout<<endl<<"Unable to open conventionhall file"<<endl;
string day,time,hall_book,target_day,target_time,res="Not booked";
cout<<endl<<"Please enter the date(Ex: 23/05/2019):";cin>>target_day;
cout<<endl<<"Please enter the time(07:00 / 11:00):";cin>>target_time;
//If the required time exists then the result(res) will be changed to booked
while(!inf.eof())
{
inf>>day>>time>>hall_book;
cout<<day<<" "<<time<<" "<<hall_book<<endl;
if(day==target_day && time==target_time) res="booked";
}
//if any of the previous booking not resembles then it will show not booked and closing the file
cout<<endl<<res<<endl;
inf.close();
}
//updating the booking of the convention hall
int update()
{
//taking necessary infos to book a time
string target_day,target_time;int c_id;
cout<<"Please enter the required date:";
cin>>target_day;
cout<<"Please enter the required time:";
cin>>target_time;
cout<<"Please enter the client id:";
cin>>c_id;
//calculating the cost
cost_cnt+=20000;
//opening the text file to append and returning the cost
ofstream outf("conventionhall.txt",ios::app);
outf<<endl<<target_day<<" "<<target_time<<" "<<c_id;
outf.close();
return cost_cnt;
}
virtual void display_cost(){};
};
//derived class of client to book restaurant
class client_restaurant:virtual public client
{
public:
//check if the restaurant is booked or not
void check()
{
//input the necessary infos
ifstream inf("restaurant.txt");
if(!inf) cout<<endl<<"Unable to open restaurant file"<<endl;
string day,time,res_book,target_day,target_time,res="Not booked";
cout<<endl<<"Please enter the date(Ex: 23/05/2019):";cin>>target_day;
cout<<endl<<"Please enter the time(Ex: 07:00):";cin>>target_time;
//comparing with the required time and giving result
while(!inf.eof())
{
inf>>day>>time>>res_book;
cout<<day<<" "<<time<<" "<<res_book<<endl;
if(day==target_day && time==target_time) res="booked";
}
cout<<endl<<res<<endl;
inf.close();
}
//booking the restaurant
int update()
{
//taking necessary data
string target_day,target_time;int c_id;
cout<<"Please enter the required date:";
cin>>target_day;
cout<<"Please enter the required time:";
cin>>target_time;
cout<<"Please enter the client id:";
cin>>c_id;
//cost count
cost_cnt+=200;
//write the text file and returning cost
ofstream outf("restaurant.txt",ios::app);
outf<<endl<<target_day<<" "<<target_time<<" "<<c_id;
outf.close();
return cost_cnt;
}
virtual void display_cost(){};
};
//derived class of children of the base class, creating diamond problem
//cost class derived from all the derived class of client
class cost : public client_conventionhall, public client_hotelroom, public client_restaurant
{
public:
//check and update function for creating polymorphism
void check(){}
int update() {}
//displaying the total cost of a client
//previously declared virtually
void display_cost(int cost)
{
cout<<endl<<"Total cost:"<<cost<<endl;
int paid; cout<<endl<<"Paid money:"<<endl; cin>>paid;
cout<<endl<<"Recievable change:"<<paid-cost<<endl;
}
//operator overloading to compute the cost
cost operator - (cost c)
{
cost c3;
c3.cost_cnt = c.cost_cnt - this->cost_cnt;
return c3;
}
};
//main function
int main()
{
//base class pointer and other class objects
client *bptr; int t;
client c1;
client_conventionhall ch1;
client_hotelroom h1;
client_restaurant r1;
cost c2;
//displaying the options
while(true)
{
//options to create and check client id
A:cout<<endl<<"Type 1 to search for a client id"<<endl<<"Type 2 to create a client id"<<endl<<"Type 0 end"<<endl;cin>>t;
//base class pointer pointing to a base class object
bptr=&c1;
//exception handing if gives unnecessary inputs
try
{
if(t==1) bptr->check();
else if(t==2) bptr->update();
else if (t==0) {}
else throw(t);
}
catch(...)
{
cout<<endl<<"typed unavailable option"; goto A;
}
//options to book and checkout
B:cout<<endl<<"Type 1 to book a hotelroom"<<endl<<"Type 2 to book convention hall"<<endl<<"Type 3 to reserve restaurant meal"<<endl<<"Type 4 to check out hotel room"<<endl<<"Type 0 to end"<<endl;cin>>t;
//exception handing if gives unnecessary inputs
try
{
//base class pointer pointing to derivved class objects
//display costs if anything is booked
if(t==1) {bptr= &h1;bptr->cost_cnt=0;bptr->check();cout<<endl<<"Type 1 to checkin , Type 0 to not"<<endl;cin>>t;
if(t){int i,d;cout<<endl<<"How many rooms do you need?"<<endl;cin>>i;while(i--) d=bptr->update(); c2.display_cost(d);}}
else if(t==2) {bptr= &ch1;bptr->cost_cnt=0; bptr->check();cout<<endl<<"Type 1 to book , Type 0 to not"<<endl;cin>>t;if(t) c2.display_cost(bptr->update());}
else if(t==3) {bptr= &r1;bptr->cost_cnt=0; bptr->check();cout<<endl<<"Type 1 to book , Type 0 to not"<<endl;cin>>t;if(t) c2.display_cost(bptr->update());}
else if(t==4) {h1.checkout();}
else if (t==0) {}
else throw(t);
}
catch(...)
{
cout<<endl<<"typed unavailable option";
goto B;
}
}
}