#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <sys/stat.h>
#include <unistd.h>
#include <ctype.h>
long filelength( char *name)
{
struct stat status;
if (stat(name, &status)==-1) return 0;
return status.st_size;
}