Thread: Please Help [Error] stray backslash in program

This is a CRC-CCITT example
Compiler show a error about "" in Line 81
But i don't used "" there
I don't know what's wrong

Code:

#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#define CRC_INIT (unsigned short)~0
#define CRC_CCITT 0x1021
#define FALSE 0
#define TRUE (!FALSE)


#define CRCUpdate(usAccumulator, usData) \ ((usAccumulator << 8) ^ vusCRCTable[(usAccumulator >> 8) ^ usData])


unsigned short * vusCRCTable;
unsigned short BuildCRCTableEntry (unsigned short usData,
                                   unsigned short usPolynomial,
                                   unsigned short usAccumulator )
{
    register int i;
    usData <<= 8;
    for( i = 8; i > 0; i-- )
        {
            if( ((usData ^ usAccumulator) & 0x8000) != 0 ) 
            {
                usAccumulator = (usAccumulator << 1) ^ usPolynomial;
            } 
            else 
            {
                usAccumulator <<= 1;
            }
            usData <<= 1;
        }
        return usAccumulator;
}
    void CRCInitCRC( void )
{
     unsigned short usPolynomial;
     int i;


     usPolynomial = CRC_CCITT;
     vusCRCTable = (unsigned short *) malloc(256 *sizeof(unsigned short));


     for( i = 0; i < 256; i++ )
         vusCRCTable[i] = BuildCRCTableEntry (i, usPolynomial, 0);
}


int main (int argc, const char *argv[])
{
 const char *szFile;
 FILE *hfile;
 unsigned short cChar;
 unsigned short int usAccumulator;
 int bLinePrint;




 if (argc < 2) 
 {
     printf ("Usage: crc <input file> [-L]\n");
     exit (1);
 }
 szFile = argv[1];


 bLinePrint = FALSE;
 if (argc == 3)
 if (tolower (argv[2][1]) == 'l')
 bLinePrint = TRUE;


 CRCInitCRC();


 hfile = fopen (szFile, "rb");
 if (!hfile) 
{
     printf ("Could not open file\n");
     exit (1);
 }




 usAccumulator = CRC_INIT;




 while ( (cChar = (unsigned short) fgetc (hfile)) != 65535) 
 {
usAccumulator = CRCUpdate(usAccumulator, cChar);/*This line*/




 if (bLinePrint) 
     {
     putchar (cChar);
         if (cChar == '\n') 
        {
             printf ("CRC: %04X\n", usAccumulator);
             getch();
         }
     }
 }


 fclose (hfile);
 printf ("File CRC = %04X.\n", usAccumulator);


 exit (0);
}