Re: while(T[l]<p & l<=r)

Janis Papanagnou <janis_papanagnou+ng@hotmail.com> writes:

On 27.03.2024 12:35, fir wrote:

tell me, is while(T[l]<p & l<=r) the same as while((T[l]<p)&&(l<=r))

>
1. As long as K&R precedences still hold you don't need the inner
parentheses; '<' and '<=' has higher precedence than '&' and '&&'.
2. In this case where you compare predicate expressions that
evaluate to '0' and '1' on both sides of '&' and '&&' respectively
these expressions are (while not the same) equivalent _here_.

The latter has shortcut semantics, and will only evaluate
r, and l a second time, if the first expression is true.
If r or l are memory mapped I/O, or similar, you might be
changing externally visible behaviour.

Phil
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