Good $daytime,
> Date: Thu, 8 Apr 1999 16:39:22 +0530
> From: Anubhav Hanjura <[EMAIL PROTECTED]>
> To: UnixC <[EMAIL PROTECTED]>
> Subject: Arrays is confusing
Anubhav> Why does this code give the strange output they give?
Pardon my ignorance, but what results did you regard as strange? It
depends heavily on what you expected :)
In general, you can't safely rely on any particular order of
calculations -- with regard to side effects.
There are four operations:
1) '++' within lvalue;
2) '++' within rvalue;
3) '[]', and
4) '='.
Dependencies are:
++ after [] []
++ after = / \
= after [] = ++
|
++
Possible orders are:
a) 3 1 4 2 [] ++ = ++ means i[0] = 1
b) 3 4 2 1 [] = ++ ++ means i[0] = 0
c) 3 4 1 2 [] = ++ ++ means i[0] = 0
However, if optimizing compiler tries to postpone evaluation of 'j'
until next usage, result most likely will be b).
Regards,
Willy.
--
"No easy hope or lies | Vitaly "Willy the Pooh" Fedrushkov
Shall bring us to our goal, | Information Technology Division
But iron sacrifice | Chelyabinsk State University
Of Body, Will and Soul." | mailto:[EMAIL PROTECTED] +7 3512 156770
R.Kipling | http://www.csu.ac.ru/~willy VVF1-RIPE
