if the user enters an invalid response (i.e.- anything other than ‘y', ‘Y', ‘n', or ‘N') the program should print an appropriate admonishment and repeat the question. Do not continue with the program or exit until the user enters an acceptable value. From now on, all programs must repeat a question if invalid input is received.
-Promp the user for a string that accepts no more that 64 characters
-How can I create a code that scans a string and replaces the non-printable characters into space character?
-How do you rearrange a the characters at a string into strict ASCII order?