%{
int num_lines = 0;
int num_spaces = 0;
int num_tabs = 0;
int num_others = 0;
%}
%%
[\n] { num_lines++; }
[ \t] { num_spaces++; }
[\x01-\x09\x0b-\x1f\x7f] { num_tabs++; }
. { num_others++; }
%%
int main() {
yylex();
printf("Number of lines: %d\n", num_lines);
printf("Number of spaces: %d\n", num_spaces);
printf("Number of tabs/meta characters: %d\n", num_tabs);
printf("Number of other characters: %d\n", num_others);
return 0;
}
int yywrap() {
return 1;
}

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SGVsbGxvdyB3b3Jk

Helllow word