Here are three possible switch-statements in C/C++/ (a) Which of these are legal in C/C++? For those that are legal, what is the value of x after each is executed?  (b) Which of these are legal in...

Here are three possible switch-statements in C/C++/

(a) Which of these are legal in C/C++? For those that are legal, what is the value of x after each is executed?

 (b) Which of these are legal in Java? For those that are legal, what is the value of x after each is executed?