в case нужно писать НЕ символы, а числы!!!! Исправленный код без ошибки: int MenuChoise, Exit; char NewHuman, OldHuman; bool number1, number2; cout << "(1) Add new Human" << endl << "(2) Show Human list" << endl << "(3) Delete Human name" << endl << "(4) Edit Human name " << endl << "(5) Close programm " << endl; cin >> MenuChoise; cout <<" " << MenuChoise << " "<< endl; switch (MenuChoise) { case 1: cout <<" variant 1"; break; case 2: cout <<" variant 3"; break; case 3: cout <<" variant 3"; break; case 4: cout <<" variant 4"; break; case 5: cout <<" variant 1"; break;