Develop a lexical scanner for Anaconda integers using the Unix utility Lex or Flex. Start by reading the compact guide to lex and yacc. The look at and experiment with the the simplescanner example which uses lex to create a simple lexical scanner for a Pascal-like language. The file scanner.l is the input to lex. Running make with the Makefile will use lex to create scanner.c and compile this to produce an executable named scanner. Invoking this with a simple file input will produce this session.