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379

answers:

1
+1  Q: 

Why C/C++ does not defined expression evaluation order?

As you may know C/C++ does not specified expression evaluation order. What are the reasons to left them undefined.

+3  A: 

It allows compiler optimizations. One example would be the reordering of arithmetic instructions for the maximum usage of the ALUs or hiding memory latency with calculations.

ebo  2009-08-01 15:09:07

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