C++

write a lexical analyzer that reads information from a file and reads each character in the lines and states the token that it is.

for example

while (fahr < upper) a = 23.00 whileend

Output:

token lexeme

--------------------------------

keyword while

separator (

identifier fahr

operator <

identifier upper

separator )

identifier a

operator =

real 23.00

keyword whileend

some things to look for are operators, seperators, keywords, identifiers, etc.

the program also notes what are considered comments and ignores those comments

! this is a comment ! or // this is a comment