type size issue

[Johandball]

Hi,

I have a numeric control. The type is unsigned int(0- 4 294 967 295). I try to get the value in an unsigned int variable with GetCtrlVal() but when the value is upper than 2 147 483 647, the value is negative. There is a mismatch between the two types. I tried to use unsigned long int, same problem.

Somebody already had this problem? Or somebody know how I can solve my problem.

Thanks everyone.

[ebalci]

Hi,

I tried to reproduce what you have described but could not succeed in observing the same behaviour.

If I set the control type as unsgined int and pass an unsigned int variable to GetCtrlVal function, it works as expected.

If you see a negative sign that means the variable is signed, so be sure you pass the correct variables.

[Johandball]

Maybe the problem happens in my version. I'm using Labwindows/CVI 8.1.1

I checked my variables, they are Unsigned int, and when I display the value (printf), I have the negative one. I can do what I want even with this problem, but it's embarrassing.

Thanks for your help and your time.

[Wolfgang]

are you sure that you use the correct format specifier in printf?

[Johandball]

wooooowwwwww!!! So many years I program in C code, and I discover %u to display an unsigned int. :s

I am so sorry. Thanks a lot for your help. I ashamed, but you are very helpful. 😄

[Wolfgang]

don't worry, it happens

[Eric.M]

Johandball,

Something like this might help you with format types 😉

http://msdn.microsoft.com/en-us/library/75w45ekt(v=vs.80).aspx

Regards,