tested lexer with more files

lexicalStructure.lex

@@ -16,7 +16,7 @@
 COM ([^*]|\*+[^)*])*
 ID [A-Za-z_][0-9A-Za-z_]*
 DIGIT [0-9]
-CHAR \\n|\\t|\\'|[^'\n\t\\]
+CHAR \\n|\\t|\\'|[^'\n\t\\]|\\\\
 	/* char can be a newline, tab, an escaped quote, or anything but a single quote, an actual line break, an actual tab, or a backslash by itself (to prevent confusion from escaped quote */
 SCHAR \\n|\\t|\\\"|[^\"\n\\]  
 	/* similar to above, a string Char (SCHAR) is the same as a CHAR except we cannot have double quotes instead of single quotes. Double quotes need to be escaped in Flex unlike single quotes based on documentation */