CompuServe Messages

You are right about the warning, however it is warning about when the store of the variable is done. The precedence is specifically listed in a standard table with the ++ a 2nd level precedence and the = a 14th level precedence. The exact warning in K&R is that: In any expression involving side effects, there can be subtle dependencies on the order in which varibales taking part in the expression are stored. The side effect occurs on how and when the compiler decides to do the store of i back into i after the increment (or for that fact, where it does the increment itself). It can legally fetch i (1), do a second fetch of i (1) and increment the 2nd fetch. It can then store the first fetch back into i thus completeing the equation. It can then go ahead and store the incremented value, thus making i = 2. It can also legally fetch the value of i (1), do the increment in memory directly on the variable so it now = 2 and then do the store of the fetched value thus completing the equation but returning a value of 1. To me, the 2nd is more "logical" and is what my compilers come up with, but both are legal. I know, that's why lots of folks don't like C. Personally, I love it……guess it all depends on your point of view.