The Incredible “Not” Search

These changes allow ZX PRO/FILE to perform “NOT” searches. This is equivalent to printing all files EXCEPT the word you input as a search command. PRO/FILE’s builtin multi-word search mode is used in this routine. The computer searches all files for a match to the first word. If one is found, it then scans the file to see if it also holds the second word. The file is printed only if the second word is not found in the file.