pointer question

[job1979]

I cannot find the answer to this question anywhere, if anyone can help it would be greatly appreciated:

What is the effect of dereferencing a pointer variable, which has the value NULL?

[linuxdude]

a seg fault

[xErath]

You program would simply crash

By C standards (correct me if wrong)
#define NULL ((void*)0)

By C++ standards
#define NULL 0

There's no place in your main memory with adress 0 so that's what would happen.

EDIT: a segmentation fault is when a process tries to acess memory that doesn't belong to it. Should acessing memory that doesn't exist be called the same way??

[job1979]

Thanks to both of you

[itsme86]

EDIT: a segmentation fault is when a process tries to acess memory that doesn't belong to it. Should acessing memory that doesn't exist be called the same way??

Incorrect. From 'man 7 signal':

SIGSEGV      11       Core    Invalid memory reference

It's not limited to memory that's not owned by you. Any invalid memory reference causes a segmentation fault.

[xErath]

Ah, thank you