Can a For Loop run in the decrementing mode?

[Scott64]

Thank you everyone for givining me some ideas.  What I have been trying to do is calculate a CRC table and this required shift bits to the right location in a 32bit word.  This word then would be put into and array.  I have looked at the C code closer and found that it doesn't matter if I increment the For loop.  Here is what I'm trying to emulate:

DWORD dwpoly = xxxxxxxx;

int i, j;

DWORD dwCRC;

for(i=0; i<256; i++)

{

dwCRC = i;

for (j=8; j>0; j--)

  {

    if(dwCRC & 1)

         dwCRC=(dwCRC >> 1) ^ dwpoly;

    else

         dwCRC >> 1;

  }

dwCRC32table[i] = dwCRC

}

Anyone delt with CRC's?

Thanks again.

Scott

[altenbach]

There are quite a few CRC programs written in LabVIEW available. For example, have a look at unclebump's attachment in the following thread:

http://forums.ni.com/ni/board/message?board.id=170&message.id=142902#M142902

Maybe whatever you need is all there already. Good luck!

[WilliamJwow]

This is the decrementing code in C language

#include <stdio.h>
main()
{
int i, n;
printf("Enter n: ");
scanf("%d", &n);

for (i = n; i>=1; i--)
{
printf("\n%d", i);
}
getch();
}

[crossrulz]

WilliamJwow,

1. This is a LabVIEW board

2. This thread is over 11 years old

Just saying your first post is completely irrelevant.  Have a nice day!

[Ben]

Hmmmm....

Comparing ....

---

@WilliamJwow wrote:

This is the decrementing code in C language

#include <stdio.h>
main()
{
int i, n;
printf("Enter n: ");
scanf("%d", &n);

for (i = n; i>=1; i--)
{
printf("\n%d", i);
}
getch();
}

---

with

I think I will stick with LabVIEW. Thank you for reminding how painful it was to code in C.

Ben