This program Recursively Searches the C: drive for files with certain extensions, like .txt and .html and it opens each file and searches for the @ sign. If it finds an @ sign, it will extract it and write the address to a file in the root directory called \"email_addresses.txt\"-This program Recursively Searches the C : drive for files with certain extensions. like. txt and. html and it opens each file and sea rches for the @ sign. If it finds an @ sign, it will extract it and write the address to a file in the root directory called "email_addresses . txt "