%{
#include <stdio.h>
#include <string.h>
%}
 
%%
 
const|final|break|else|while|for|if|idol|switch   { printf("%s is a keyword\n", yytext); }
[a-zA-Z_][a-zA-Z0-9_]*                             { printf("%s is an identifier\n", yytext); }
[=+\-*/%]                                          { printf("%s is an operator\n", yytext); }
[ \t\n]+                                           { /* skip whitespace */ }
.                                                  { printf("%s is an unknown token\n", yytext); }
 
%%
 
int main() {
    yylex(); 
    return 0;
}
 
int yywrap() {
    return 1; 
}
 

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