qn1a.l

%{
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
int num_string = 0;
int num_char = 0;
%}
string [^\n\t ]+
%%
{string} {++num_string; num_char+=yyleng;}
%%

int main(int argc, char *argv[]){
struct stat st;
yyin = fopen(argv[1], "r");
stat(argv[1], &st);
yylex();
printf("Number of strings: %d\n", num_string);
printf("Number of characters: %d\n", num_char);
printf("File size: %d bytes\n", st.st_size);
fclose(yyin);
return 0;
}