Question

My instructor gave us some sample code and she used a \a1 \a2 \a3 \a4 \a5
Can someone tell me what it is used for? I can’t find it online or in my textbook?

cout<<"\n\t\a\a1----INSERT A NODE IN A BINARY TREE.\a\a";
cout<<"\n\t\a\a2----PRE-ORDER TRAVERSAL.\a\a";
cout<<"\n\t\a\a3----IN-ORDER TRAVERSAL.\a\a";
cout<<"\n\t\a\a4----POST-ORDER TRAVERSAL.\a\a";
cout<<"\n\t\a\a5----EXIT.\a\a";
cout<<"\n\t\a\aENTER CHOICE::\a\a";

Answer 1

\a is “alert”, or “bell”. It’s listed here, for instance. Running this on a terminal with an actual audible bell (or even a visual one, where the whole screen flashes briefly) would surely be horrible. That’s rather strange code to get from an instructor.

The sequence \a1 is simply \a followed by the digit 1, it’s not a two-letter escape code.