An index generally contains only keywords. Write a program that uses a file of keywords to index a document. It begins by reading the keyword file and inserting the words into an AVL tree. It then...

An index generally contains only keywords. Write a program that uses a file of keywords to index a document. It begins by reading the keyword file and inserting the words into an AVL tree. It then reads the document and builds an AVL tree index of the keywords in the document. Print the keyword index at the end of the document.