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Date: Tue, 25 Feb 2014 05:25:25 +1100
Subject: Re: Can global variable be passed into Python function?
From: Chris Angelico <rosuav@gmail.com>
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Xref: csiph.com comp.lang.python:66993

On Tue, Feb 25, 2014 at 5:20 AM,  <random832@fastmail.us> wrote:
> On Mon, Feb 24, 2014, at 13:05, j.e.haque@gmail.com wrote:
>> typedef struct {
>>   int value;
>> } Number;
>>
>>   Number *o;
>>   o = malloc(sizeof(*o));
>>   o->value=3;
>>   printf("o<%p>, o->value<%p>\n", o, &o->value);
>>
>> o<0x9fe5008>, o->value<0x9fe5008>
>>
>> Is the compiler borked?
>
> That's cheating. Try printf("o<%p>", &o);

It's not cheating, but it's showing something different. Comparing o
and &o->value shows that the structure itself and its first member are
at the same location in memory. Comparing o and &o shows that the
structure and the pointer to the structure are at different locations
in memory.

ChrisA