example_1_1_wc.lex

/* just like Unix wc */
%{
  int chars = 0;
  int words = 0;
  int lines = 0;
%}

%%
[a-zA-Z]+ { words++; chars += strlen(yytext); }
\n { chars++; lines++; }
. { chars++; }
%%

main(int argc, char **argv)
{
  yylex();
  printf("%8d%8d%8d\n", lines, words, chars);
}