C++

write a lexical analyzer that reads a string from a file and goes through each character and deciphers the lexical value.

he 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

the table is then written to another file

somwthing to look for are keywords, identifiers, operators, separators, digitts, real numbers (with a decimal)

the program also identifies comments and ignores them such as !comment! or //comment