add sla

services/carbeat/chall/mybini.cpp

@@ -158,6 +158,7 @@ int main(){
             std::cout << "1. register" << std::endl;
             std::cout << "2. login" << std::endl;
             std::cout << "3. list karbit" << std::endl;
+            std::cout << "4. exit" << std::endl;
             std::cout << "> ";
             std::cin >> c;
 
@@ -185,6 +186,9 @@ int main(){
                 case 3:
                     for (auto& user : users) user.info();
                     break;
+                case 4:
+                    std::cout << "bye!" << std::endl;
+                    exit(0);
                 default:
                     std::cout << "invalid option" << std::endl;
             }