Information of 512 Bytes to fill space of Bad Sector

/*Information of 512 Bytes to fill space of Bad Sector */

/// I used 512 zeros to fill the space of 512 bytes \\\

static char dbuf2[512] =
"00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000" "00000000000000000000000000000000";

FILE *tt;
clrscr();
printf("\n Enter The Name of file with Path to store The Data Temporarily\n");
gets(filename);
if((tt=fopen(filename,"wb"))==NULL)
{
printf("Could Not Create The File, Press any Key To
EXIT");
getch();
exit(0);
}
printf("\n Initializing Floppy Disk System...\n");

/// Initialize the Disk System \\\

for(i=0; i<3; i++)
{
regs.h.ah = 0x00; /* Reset Disk System */
regs.h.dl = 0x00; /* Floppy Disk a: */

int86(0x13, &regs, &regs);
}

for(track=0;track<=79;track++)
{
for(head=0;head<=1;head++)
{
for(sector=1;sector<=18;sector++)
{
dinfo.drive = 0; /* drive number for A: */
dinfo.head = head; /* disk head number */
dinfo.track = track; /* track number */
dinfo.sector = sector; /* sector number */
dinfo.nsectors = 1; /* sector count */
dinfo.buffer = dbuf; /* data buffer */

result = _bios_disk(_DISK_READ, &dinfo);

if ((result & 0xff00) == 0)
{
for(i=0;i<512;i++)
fprintf(tt,"%c",dbuf[i] & 0xff);
}

else
{
printf("Cannot read drive A, status =
0x%02x\t%d\t%d\t%d\n", result, head, track, sector);

/* If Sector is not Readable, occupy 512 bytes by dbuf2 */

fwrite(dbuf2,512,1,tt);
}

printf("Reading Track= %d Head= %d Sector= %d\n",
track, head, sector);
}
}
}
}

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