C++: Palindrome Detector

A palindrome is any word, phrase, or sentence that reads the same forward and backward.

Here are some well-known palindromes:

Able was I, ere I saw Elba

A man, a plan, a canal, Panama

Desserts, I stressed

Kayak

Write a boolean function that uses recursion to determine whether a String argument is a palindrome. The function should return true if the argument rads the same forward and backward. Demonstrate the function in a program.