%{
int num_lines = 0, num_words = 0, num_chars = 0;
%}

word  [^ \t\n]+
eol   \n

%%
{eol}           { ++num_lines; num_chars += yyleng; }
{word}          { ++num_words; ++num_chars; }
.               { ++num_chars; }
%%
main()  {
  yylex();
  printf( "# of lines = %d, # of words = %d\n",
               num_lines, num_words );
}

yywrap() { return 1; }