%{unsigned charCount = 0, wordCount = 0, lineCount = 0;%}word [^ \t\n]+eol  \n%%{word}	{ wordCount++; charCount += yyleng; }{eol}	{ charCount++; lineCount++; }.	charCount++;%%main(argc,argv)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;}