%{
#include <stdio.h>
%}
 
%%
 
int|float|char|double|short|long|unsigned|signed|void|auto|const|extern|static|register|volatile { printf("KEYWORD: %s\n", yytext); }
[a-zA-Z][a-zA-Z0-9]* { printf("IDENTIFIER: %s\n", yytext); }
[ \t]+               { printf("WHITESPACE: \"%s\"\n", yytext); } 
\n                   { printf("NEWLINE\n"); }
.                    { printf("CHARACTER: %c\n", yytext[0]); }
 
%%
int yywrap() {
    return 1;
}
int main() {
    yylex();
    return 0;
}
 
 

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