/* File: ch2-02.l (modified from lex & yacc book by John Levine) */
%{
#include <stdio.h>

unsigned charCount = 0, wordCount = 0, lineCount = 0;
%}

word [^ \t\n]+
eol  \n
%%
{word}  { wordCount++; charCount += yyleng; }
{eol}   { charCount++; lineCount++; }
.   charCount++;
%%
main(int argc, char **argv)
{

    if (argc > 1) {
        FILE *file;

        file = fopen(argv[1], "r");
        if (!file) {
            fprintf(stderr,"could not open %s\n",argv[1]);
            exit(1);
        }
        yyin = file;
    }
    yylex();
    printf("%d %d %d\n",charCount, wordCount, lineCount);
    return 0;
}