CRC calculation

[ALuPin]

Hi,

I have found a piece of C code for checksum calculation
CRC16 ccitt.

Is that right?
How can I initialize crc?




#include <stdio.h>

int crc_1021(int data)
{

int x;

x = ((crc>>8) ^ data) & 0xff;
x ^= x>>4;
crc = (crc << 8) ^ (x << 12) ^ (x <<5) ^ x;
crc &= 0xffff;

return(crc);

}

int main()

{
int crc
printf("The CRC16-X25_ccitt of %d is %d. \n", crc, crc_1021(crc));
return 0;
}

 

[Grumble]

I have found a piece of C code for checksum calculation
CRC16 ccitt.

Is that right?
How can I initialize crc?

Errr. Where is your question about the C language?

 

[Jack Klein]

Hi,

I have found a piece of C code for checksum calculation
CRC16 ccitt.

Is that right?
How can I initialize crc?




#include <stdio.h>

int crc_1021(int data)
{

int x;

x = ((crc>>8) ^ data) & 0xff;
x ^= x>>4;
crc = (crc << 8) ^ (x << 12) ^ (x <<5) ^ x;
crc &= 0xffff;

return(crc);

}

int main()

{
int crc

Change the line above to:

int crc = /* whatever initial value you want */

 

[ALuPin]

Errr. Where is your question about the C language?

Hey,

if you do not want to help then SHUT UP.

Thank you very much.

Best regards

 

[xarax]

Hey,

if you do not want to help then SHUT UP.

Thank you very much.

Best regards

You are posting your question in the wrong
group, so please take your own advice.

 

[Mark McIntyre]

if you do not want to help then SHUT UP.

You ask an offtopic question, get asked what your actual relevant question
is, and are rude? Thats very silly.

Thank you very much.

Welcome.