Switch Fall-through a question

1, problem description
Output the following results

intn ='C';Switch(n++){    default: printf ("Error"); Break;  Case 'a': Case 'A': Case 'b': Case 'B':p rintf ("AB"); Break;  Case 'C': Case 'C':p rintf ("C");  Case 'D': Case 'D':p rintf ("D");}

2. Results
Cd

3, analysis
Switch Fall-through: If the case does not add a break, it is executed sequentially.
Also on default, if no conditions are met, execute the default post statement.
If there is a condition, execute the corresponding conditional statement first, if you do not add a case and then execute down, pass the default
is also executed after the default statement, if default is above the condition, no case is
Executes the after default statement.

Switch Fall-through a question