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I’d just add to the answers the “why?
It’s best to check your pointers against NULL directly, and use 0 in other contexts. You will end up with code like this: This article has also been viewed 27, times. This can cause a major headache.
Test for any value but NULL. The whole mess of typedef-ing functions poibter all the extra parentheses would have been avoided as well.
But I am not entirely sure. A simple if ptr tests whether ptr is TRUE. One common mistake f to assume that a newly created pdogramlama has a NULL value. Test whether the variable is true.
pointers – Arrow operator (->) usage in C – Stack Overflow
I think that it is used to call members and functions like the equivalent of the.
C library function – memcpy()
The following is the most obvious way to write a null check. Help answer questions Learn more.
Jack k 26 Donald Duck orogramlama, 12 39 Thank you for your feedback! I found this solution on page of Stephen Kochan’s Programming in C. Cookies make wikiHow better. Write the NULL first to avoid errors optional. It’s common practice to set newly created or newly freed pointers to NULL to make sure you don’t use this unhelpful address by accident.