diff --git a/OTT.cpp b/OTT.cpp
new file mode 100644
index 0000000..1a1ffb2
--- /dev/null
+++ b/OTT.cpp
@@ -0,0 +1,337 @@
+#include <iostream>
+#include <vector>
+#include <string>
+#include <fstream>
+#include <sstream>
+#include <algorithm>
+using namespace std;
+
+class User {
+public:
+    string name;
+    string password;
+    vector<string> rentedMovies;
+    vector<string> purchasedItems;
+    int chargeDues;
+
+    User() {
+        chargeDues = 0;
+    }
+};
+
+class Admin {
+public:
+    string name;
+    string password;
+    vector<string> movieList;
+    vector<string> TVshows;
+
+    Admin() {
+        
+        movieList= {
+            "The Shawshank Redemption",
+            "The Godfather",
+            "The Dark Knight",
+            "Pulp Fiction",
+            "Schindler's List",
+            "The Lord of the Rings: The Return of the King",
+            "Fight Club",
+            "Forrest Gump",
+            "Inception",
+            "The Matrix",
+            "Goodfellas",
+            "The Godfather: Part II",
+            "Interstellar",
+            "Gladiator",
+            "The Silence of the Lambs",
+            "Titanic",
+            "Saving Private Ryan",
+            "The Green Mile",
+            "Avengers: Endgame",
+            "The Lion King (1994)"
+        };
+        TVshows = {
+            "Breaking Bad",
+            "Game of Thrones",
+            "Stranger Things",
+            "The Boys",
+            "The Crown",
+            "The Last of Us",
+            "Peaky Blinders",
+            "Money Heist",
+            "Dark",
+            "Chernobyl",
+            "The Mandalorian",
+            "The Witcher",
+            "The Office",
+            "Friends",
+            "Narcos",
+            "Better Call Saul",
+            "Loki",
+            "The Queen's Gambit",
+            "House of the Dragon",
+            "Wednesday"
+        };
+    }
+};
+//using file handling to save the data of users
+void saveUserToFile(const User& user) {
+    ofstream file("users.txt", ios::app); // Append mode
+    file << user.name << "," << user.password << "," << user.chargeDues << ",";
+
+    for (size_t i = 0; i < user.rentedMovies.size(); ++i) {
+        file << user.rentedMovies[i];
+        if (i != user.rentedMovies.size() - 1) file << "|";
+    }
+    file << ",";
+
+    for (size_t i = 0; i < user.purchasedItems.size(); ++i) {
+        file << user.purchasedItems[i];
+        if (i != user.purchasedItems.size() - 1) file << "|";
+    }
+    file << "\n";
+    file.close();
+}
+
+vector<User> loadUsersFromFile() {
+    vector<User> users;
+    ifstream file("users.txt");
+    string line;
+
+    while (getline(file, line)) {
+        User user;
+        stringstream ss(line);
+        string rented, purchased;
+
+        getline(ss, user.name, ',');
+        getline(ss, user.password, ',');
+        string dues;
+        getline(ss, dues, ',');
+        user.chargeDues = stoi(dues);
+
+        getline(ss, rented, ',');
+        stringstream rs(rented);
+        string item;
+        while (getline(rs, item, '|')) {
+            if (!item.empty()) user.rentedMovies.push_back(item);
+        }
+
+        getline(ss, purchased);
+        stringstream ps(purchased);
+        while (getline(ps, item, '|')) {
+            if (!item.empty()) user.purchasedItems.push_back(item);
+        }
+
+        users.push_back(user);
+    }
+    file.close();
+    return users;
+}
+
+void callOtt(string msn) {
+    vector<User> persons = loadUsersFromFile();
+    Admin admin;
+
+    while (true) {
+        cout << "... ....... WELCOME ....... ...\n";
+        cout << ".........SIGN UP......" << endl;
+        cout << "Want to sign up as user? Type user\n";
+        cout << "Want to sign up as admin? Type admin\n";
+        string s;
+        getline(cin, s);
+
+        if (s == "user") {
+            string p, q;
+            cout << "Enter your name: (use Snakecase eg. user_case)" << endl;
+            getline(cin, p);
+            // Check if user already exists
+            User* userPtr = nullptr;
+            for (auto& user : persons) {
+                 if (user.name == p) {
+                     userPtr = &user;
+                     break;
+                 }
+             }
+             
+            // If user doesn't exist, create new user
+            bool isNewUser = (userPtr == nullptr);
+            if (isNewUser) {
+                 persons.push_back(User());
+                 userPtr = &persons.back();
+                 userPtr->name = p;
+             }
+             
+             User& user = *userPtr; // Reference to either existing or new user
+            
+            
+            cout << "Enter your password (default: 1234): " << endl;
+            cin >> q;
+            cin.ignore();
+            user.password = q;
+            if (q != "1234") {
+                cout << "Incorrect password ,try again" << endl;
+                return;
+            }
+
+            cout << "......WELCOME........" << endl;
+            cout << "Press 1 -> Browse content\n";
+            cout << "Press 2 -> Rent movies\n";
+            cout << "Press 3 -> Return rented content\n";
+            cout << "Press 4 -> View rented items\n";
+            cout << "Press 5 -> View purchased items\n";
+            cout << "Press 6 -> Check charges due\n";
+
+            int choice;
+            cin >> choice;
+            cin.ignore();
+
+            if (choice == 1) {
+                string content;
+                cout << "Search your content (Movie/TV Show),(use Snakecase eg. user_case): ";
+                cin >> content;
+
+                int press;
+                cout << "Press 1 to rent"<<endl;
+                cout<< "Press 2 to purchase"<<endl;
+                cout<< "Press 3 to watch"<<endl;
+                cin >> press;
+
+                if (press == 1) {
+                    cout << "Rent price: 120\n Rent period: 1 year\nType 'ok' to rent: ";
+                    string rent;
+                    cin >> rent;
+                    if (rent == "ok") {
+                        user.rentedMovies.push_back(content);
+                        cout << content << " is added to your rented list\n";
+                    }
+                } else if (press == 2) {
+                    cout << "Pay 200 through UPI\nType 'ok' to buy: ";
+                    string purchase;
+                    cin >> purchase;
+                    if (purchase == "ok") {
+                        user.purchasedItems.push_back(content);
+                        cout << "Thanks for shopping here\n";
+                    }
+                } else if (press == 3) {
+                    cout<<"duration of movie 3hrs"<<endl;
+                    cout << "Enjoy your movie!\n";
+                }
+            } else if (choice == 2) {
+                cout << "Enter movie name: ,(use Snakecase eg. user_case)"<<endl;
+                string movie;
+                cin >> movie;
+                cout << "Rent price: 120\nPay now or add to dues? (NOW/LATER): "<<endl;
+                string pay;
+                cin >> pay;
+                if (pay == "NOW") {
+                    cout << "Paying 120 via UPI...\n";
+                    user.rentedMovies.push_back(movie);
+                } else if (pay == "LATER") {
+                    user.chargeDues += 120;
+                    cout << "Added to charge dues\n";
+                }
+            } else if (choice == 3) {
+                cout << "Enter movie name to return:,(use Snakecase eg. user_case) "<<endl;
+                string movie;
+                getline(cin, movie);
+                auto it = find(user.rentedMovies.begin(), user.rentedMovies.end(), movie);
+                if (it != user.rentedMovies.end()) {
+                    user.rentedMovies.erase(it);
+                    cout << "Returned successfully\n";
+                } else {
+                    cout << "Movie not found in rented list!\n";
+                }
+            } else if (choice == 4) {
+                cout << "Rented movies:\n";
+                for (auto& m : user.rentedMovies) cout << m << "\n";
+            } else if (choice == 5) {
+                cout << "Purchased items:\n";
+                for (auto& p : user.purchasedItems) cout << p << "\n";
+            } else if (choice == 6) {
+                cout << "Total charges due: " << user.chargeDues << "\n";
+            }
+
+            // Save the user and add to memory
+            persons.push_back(user);
+            saveUserToFile(user);
+        }
+
+        else if (s == "admin") {
+            cout << "Enter name: ";
+            string name;
+            getline(cin, name);
+            admin.name = name;
+
+            cout << "Enter password (default 4321): "<<endl;
+            string pass;
+            cin >> pass;
+            cin.ignore();
+
+            if (pass == "4321") {
+                cout << "Press 1 -> Add movie\n";
+                cout << "Press 2 -> Remove movie\n";
+                cout << "Press 3 -> View dues\n";
+                cout << "Press 4 -> View users profile\n";
+                cout<< "Press 5 -> view list of all movies and tv shows \n";
+
+
+                int press;
+                cin >> press;
+                cin.ignore();
+
+                if (press == 1) {
+                    string movie;
+                    cout << "Movie/TV show to add:,(use Snakecase eg. admin_case) "<<endl;
+                    getline(cin, movie);
+                    admin.movieList.push_back(movie);
+                    cout << "Added successfully.\n";
+                } else if (press == 2) {
+                    string movie;
+                    cout << "Movie/TV show to remove:(use Snakecase eg. admin_case) "<<endl;
+                    getline(cin, movie);
+                    auto it = find(admin.movieList.begin(), admin.movieList.end(), movie);
+                    if (it != admin.movieList.end()) {
+                        admin.movieList.erase(it);
+                        cout << "Removed successfully.\n";
+                    } else {
+                        cout << "Not found in list.\n";
+                    }
+                } else if (press == 3) {
+                    for (auto& u : persons) {
+                        cout << u.name << " : " << u.chargeDues << endl;
+                    }
+                } else if (press == 4) {
+                    for (auto& u : persons) {
+                        cout << u.name << endl;
+                    }
+                }
+                else if(press==5){
+                    cout<<"all movies: "<<endl;
+                    for(int i=0;i<admin.movieList.size();i++){
+                        cout<<admin.movieList[i]<<endl;
+                    }
+                    cout<<endl<<endl;
+                    cout<<"all tv shows: "<<endl;
+                    for(int i=0;i<admin.TVshows.size();i++){
+                        cout<<admin.TVshows[i]<<endl;
+                    }
+                    cout<<endl;
+                    
+                }
+            } else {
+                cout << "Wrong password!\n";
+            }
+        }
+
+        string choice;
+        cout << "\nExit platform? (yes/no): ";
+        cin >> choice;
+        cin.ignore();
+        if (choice == "yes" || choice == "YES") break;
+    }
+}
+
+int main() {
+    callOtt("OTT");
+    return 0;
+}
diff --git a/ros2assignment.zip b/ros2assignment.zip
new file mode 100644
index 0000000..5272a09
Binary files /dev/null and b/ros2assignment.zip differ