-get last name from user

-output: 
   Your last name, _________, begins with a _____, and is ___ characters long.


-solution:

   cout << "Enter your last name:";
   string last_name;
   cin >> last_name;

   cout << "Your last name, "
	<< last_name
	<< ", begins with a "
	<< last_name.substr(0,1)
	<< ", and is "
	<< last_name.length()
	<< " characters long.";