Use your knowledge of regular expressions in C++ to
solve the following problem:

1. Design and write a C++ program that reads a file that
   contains a 10-digit North American telephone number on
   each line (3-digit area code, 3-digit exchange number,
   and 4-digit phone number). Each line is supposed to
   contain nothing but the number.

2. Such a phone number is "valid" if the three parts are
   not separated at all, or if they are separated by a
   dash, a dot (period) or a space. In this case both 
   separators must be the same. Also, the area code may
   be enclosed in parentheses, in which case the exchange
   number follows immediately after the right parenthesis
   and there is either no separator or a single separator
   between the exchange number and the phone number.

3. For each line in the file the corresponding output looks
   like one of these lines:

matched = true  ## valid = true
matched = true  ## valid = false
matched = false ## valid = false

Put your program in a file called ValidateTelNums.cpp and
when it is working, copy the source and the executable,
which must be called ValidateTelNumss.exe, to your K: drive.