|  |  6.3.1 No rvalue of increments and assignments 
The increment operator ++(resp. decrement operator--)
has no rvalue, i.e., cannot be used on the right-hand sides of
assignments.  So, instead of 
 
(which results in an error), it must be written
 
 
Likewise, an assignment expression does not have a result.  Therefore,
compound assignments like i = j = k;are not allowed and result
in an error. 
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