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Cannot access memory at address 0x8

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# 8  
Old 07-07-2008
Quote:
Originally Posted by spirtle
You are dereferencing a null pointer:
Code:
ims_fp=NULL;
...
printf("%d",ims_fp->j);

According to the language definition, the behaviour is undefined if you do this, so that's why you have different behaviour on different platforms.
In order to make your code run correctly, you need to either remove the lines
AFAIK...the standard says that you cannot de-reference a generic pointer but does not say anything about de-referencing a NULL pointer.
# 9  
Old 07-07-2008
I am no language lawyer, but AFAIK, it does.

Quote:
6.5.3.2
...
If an invalid value has been assigned to the pointer, the behavior of the unary * operator is undefined.(84)
Quote:
(84)
...
Among the invalid values for dereferencing a pointer by the unary * operator are a null pointer, ...
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