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What does adding a "u" to a hexadecimal number do?
Moderators: Ajay, Junied , abbas1707, Arun Kumar V, pdi33, Shailesh NAYAK, ۞ TPS ۞, shyam, sashijoseph
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Todor
Fri Jun 27 2008, 12:18AM
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Hi, everyone! I'm new in this forum, so if my thread is in the wrong place, please move it.
I'm looking at a C source code for a C8051F124(8051 based), and I've found the following definition "#define ARP_OPERATION_REQ 0x01u". My question is, what does the "u" letter do with the constant value?

P.S. I suppose, that it have something to do with a little-endian - big-endian compatibility, but I'm not sure.

Thanks in advantage!
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sashijoseph
Sat Jun 28 2008, 05:37AM

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I think it forces the value to be an unsigned type...
Let there be music........
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8051 Microcontroller Projects 8051 AVR tutorials PIC microcontroller, 8051 assembly language programming electronics and communication ECE CSE pdf ebooks library BE final year project ideas Embedded systems