I have a very small doubt(might sound silly..).
consider a char pointer that is undefined.
now, if i try to access the undefined pointer, i will get a run time error.Code:char *p;
This much i understand.Code:char ch = p[0];
I could initialize the pointer to NULL. But let's say i didn't do that.
Is there a way to check whether a pointer is undefined?
> Is there a way to check whether a pointer is undefined?
No.
And the correct term is uninitialised.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Uninitialized.. I will remember that. Thanks.
You are writing the code, you are responsible for it's behaviour... if your code is working correctly why on earth would you need to check if something is uninitialized?
..Or unitialized.......I guess depending on what side of the water your on.Originally Posted by Salem
Warning: Some or all of my posted code may be non-standard and as such should not be used and in no case looked at.
Usually the reason is sloppiness: creating something before it is needed, then having to work out later if it has a usable value.
The better approach is to ensure it is initialised before doing anything else with it. That can mean initialising it when creating it, only creating it immediately before it is needed, and/or having sensible flow control so that you know the pointer is initialised before any code that tries to use it.
You will have to excuse me on this one, but why on earth would you not initialize it to NULL when you create it if you you can't use it right away? I know the new standard allows you to create variables willy-nilly, but still there is wisdom in the "old ways".
Warning: Some or all of my posted code may be non-standard and as such should not be used and in no case looked at.
