op= construction

[Doug Gwyn]

In article <108 at mruxe.UUCP> cgw at mruxe.UUCP (C Waldman) writes:
-	In a loop, an array element is incremented, then the array index
-	is advanced to the next element. I recently coded this with
-	....
-	total[i++] += f;
-	....
-	After a couple of "Memory fault- core dumped" messages, I realized
-	that i is getting incremented twice. I broke it into two lines and
-	everything was ok, but I'm wondering why this construction doesn't
-	work.

Either you were incrementing i somewhere else too (e.g. in the for() head),
or else your compiler has a bug.  The whole point of the op= operators is
that the left side is supposed to be evaluated only once.