Are long and int16 really the same?

[SteveW]

According to the compiler manual, a long and an int16 are the same. Is this correct? Should long = int32? Typically a long is at least 32 bits.

Regards,

Steve

[PCM programmer]

Yes, in CCS a 'long' and 'int16' are the same.

Note that they are also both unsigned.

[SteveW]

An int16 is unsigned? Wow, I would have never guessed that! Thanks, you just potentially save me a lot of headaches. So, for an integer of any type to be signed, it must explicitly be declared as signed? I have never seen a C compiler with this "feature". Is there a reason for it?

Regards,

Steve

[PCM programmer]

Somewhere there is a post I think, by Ttelmah, that speculates on
why CCS did it this way, but I can't find it. But I did find
a whole thread of screaming on the topic. LOL.
http://www.ccsinfo.com/forum/viewtopic.php?t=1073&start=0

[SteveW]

Interesting thread. I am now very happy that I started reading the manual before using the product. I would have never considered that a default int would be unsigned. I can live with this quirk, but how many more are there? Back to my reading.

Thanks again,

Steve

[Guest]

It works the other way. I now code in CCS 99% of the time and try and use CCS "C" in the real world as well!

[SherpaDoug]

It is always eye-opening for C++ programmers when I explain that I can't just add another flag to my old 16C54 code because I have already used the extra bits available in the Status register and adding another short would require a whole byte which I just don't have!
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[treitmey]

yes, keep hold of all those spare bits. Don't use a byte when a bit will do.