c.l

%option
  #include <stdio.h>
alpha [a-zA-Z]
digit [0-9]
character .
%%
[ \t]		;
int	return INT;
float return FLOAT;
char return CHAR;
{digit}+|({digit}+"."{digit}+) return NUM;
_*{alpha}({alpha}|{digit})* return ID;
"\""{character}{1}"\""|"\'"{character}{1}"\'" return CHARACTER;
"=" return EQUAL;
"!" return NOT;
"||" return OR;
"&&" return AND;
"+" return PLUS;
"%" return MOD;
"-" return MINUS;
"*" return ASTERISK;
"**" return EXP;
"/" return DIV;
"(" return OP;
")" return CP;
 .       return yytext[0];

%%