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

Janis Papanagnou wrote:

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))

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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_. If
you don't want to operate on bits but want to express a boolean
conjunction you should use '&&', though.
>

ok tnx much this is quite solid answer
imagine i began to learn c in a week when WTC attack was (maybe like about wednesday after that if it was friday (im not sure but somethin about that) and wtill dont memrized those pices - but the answer of the above is easy to remember "<" stronger than  "&"
hovever i wopuld disagre to use "&&" instead "&" then
&& look much worse and probably & has no real disadvantages (i mean no bigger that the intention that && should be use for boolean - which probably comes from later c not oryginal young c
so i probably plan to stick to &

i was unable ro remember that

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You could look that up if you cannot remember that. Wikipedia[*]
has a page with a lot information, and a concise list you can,
for example, find here:
https://www.cs.uic.edu/~i109/Notes/COperatorPrecedenceTable.pdf
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Janis
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[*] https://en.wikipedia.org/wiki/Operators_in_C_and_C%2B%2B
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