ROT13 (rotate by 13 places) is a simple letter substitution cipher that is an instance o...

ROT13 (rotate by 13 places) is a simple letter substitution cipher that is an instance of a Caesar cipher developed in ancient Rome and used by Julius Caesar who used it in his private correspondence. ROT13 replaces a letter with the letter 13 letters after it in the alphabet. The following table demonstrates the translation in ROT13:

Thus, the translation of the word JULIUS using ROT13 would be WHYVHF. Write a C++ program that asks the user for the name of an input file and translates the contents of that input file using ROT13. Your program should output the translation into a secondary file with a “.rot13” file extension.