#: 7804 S3/Languages
    27-Oct-90  16:13:00
Sb: #7798-#OSK C
Fm: James Jones 76257,562
To: Jay Truesdale 72176,3565 (X)

You typed |= and you probably meant !=.  A subtle difference, but a crucial
one!  The reason the caret points at the = is that it's the left-hand side of
the |= assignment operator, or rather, the = is the root node of the expression
tree that's the left child of the |=.

Actually, you're pretty darned lucky; the rest of the |= should have been !=
too, but because just ch (which is an lvalue) was the LHS, the compiler would
have blithely done what you told it to do, and your loop would have run
forever!

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