#include #include #include #include #include class SmartDoor { private: std::string doorName; bool isLocked; std::vector authorizedUsers; std::vector securityLog; public: SmartDoor(const std::string& name) : doorName(name), isLocked(true) {} void unlock(const std::string& user) { if (std::find(authorizedUsers.begin(), authorizedUsers.end(), user) != authorizedUsers.end()) { isLocked = false; logEvent(user + " unlocked the door."); std::cout << doorName << " is unlocked. Welcome, " << user << "!" << std::endl; } else { logEvent("Unauthorized attempt to unlock by " + user + "."); std::cout << "Access denied. Unauthorized user." << std::endl; } } void addAuthorizedUser(const std::string& user) { authorizedUsers.push_back(user); logEvent(user + " added as an authorized user."); std::cout << user << " has been added as an authorized user." << std::endl; } void checkStatus() const { std::cout << "Smart Door Status: " << doorName << std::endl; std::cout << "Locked: " << (isLocked ? "Yes" : "No") << std::endl; std::cout << "Authorized Users:" << std::endl; for (const auto& user : authorizedUsers) { std::cout << "- " << user << std::endl; } } void logEvent(const std::string& event) { securityLog.push_back(getCurrentTime() + " - " + event); } void displaySecurityLog() const { std::cout << "Security Log for " << doorName << ":" << std::endl; for (const auto& entry : securityLog) { std::cout << entry << std::endl; } } private: std::string getCurrentTime() const { std::time_t now = std::time(nullptr); std::tm* timeInfo = std::localtime(&now); char buffer[80]; std::strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", timeInfo); return buffer; } }; int main() { SmartDoor frontDoor("Front Door"); frontDoor.addAuthorizedUser("Alice"); frontDoor.addAuthorizedUser("Bob"); frontDoor.unlock("Alice"); frontDoor.unlock("Eve"); // Unauthorized attempt frontDoor.checkStatus(); frontDoor.displaySecurityLog(); return 0; }