Is there a subset of C can write like this: i=+1?

Question

I remember reading a book talking about standard the C programming language. It said in some kinda C you can write i=+1 which equals i+=1. So i(operator)=(expression) equals i=(operator)(expression). I never see this kind of C, is there someone who can explain this?

Best regards and thanks, Fan

Answer 1

That was the very very inital syntax for the += operator in C. I think it was deprecated even before the first edition of K&R book.

EDIT: A PDF with the C Reference manaual can be found here: http://www.math.utah.edu/computing/compilers/c/Ritchie-CReferenceManual.pdf look at 7.14.1

(Alas, the one posted by AnT is no longer valid)

Answer 2

This is true. That version of C is called CRM C (CRM stands for "C Reference Manual" - a document written by Dennis Ritchie). There are many weird things in that version of C.

You can download the document here http://cm.bell-labs.com/cm/cs/who/dmr/cman.pdf