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Strange memory allocation int a[atoi(argv[1])] ?!
- From: chimi <gchimi at gmail dot com>
- To: gcc-help at gcc dot gnu dot org
- Date: Mon, 11 Jun 2007 09:19:38 -0700 (PDT)
- Subject: Strange memory allocation int a[atoi(argv[1])] ?!
Hello!
I've just heard that teachers from one of the university of technology say
that:
int a[atoi(argv[1])];
is correct way to dynamic allocation... what is more it looks like x =
a[999999]; works! o_O
but I run memusage test-prog 1000000 and it doesn't call *alloc nor free at
all, but works well...
in the other hand
int a[32];
doesn't allow to acces its 1000000 element (it's ok of course)
I wanted to know what gcc does with atoi(argv[2])? Does it only OS allocate
so huge heap so it works?
Or do they wrong?
--
chmi
--
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