C triple dereferencing

Question

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Uses for multiple levels of pointer dereferences?

I have used functions with doubly dereferenced pointers (**var) to return values. However, I was recently asked a question to figure out a use-case where a triple dereferencing (***var) may be needed. I couldn't think of any practical scenario. Does anyone have any experience here?

Duplicate: http://stackoverflow.com/questions/758673/uses-for-multiple-levels-of-pointer-dereferences — Chris Lutz, Apr 22 '10 at 06:14

score 3 · Accepted Answer · answered Apr 22 '10 at 06:15

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Three dimensional arrays.

answered Apr 22 '10 at 06:15

Martin York

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score 2 · Answer 2 · answered Apr 22 '10 at 06:15

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If you have a tensor, then you would need triple dereferencing.

answered Apr 22 '10 at 06:15

Michael Aaron Safyan

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score 1 · Answer 3 · answered Apr 22 '10 at 06:30

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if you want to have a two-dimensional pointer array used to referencing a general two-dimensional array, you would need triple dereferencing.

answered Apr 22 '10 at 06:30

Jasper-Chen

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score 1 · Answer 4 · answered Apr 22 '10 at 06:39

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A two dimensional array containing pointers to functions.

answered Apr 22 '10 at 06:39

antler

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score 0 · Answer 5 · answered Apr 22 '10 at 06:15

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A pointer to a handle.

answered Apr 22 '10 at 06:15

Martin York

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I only see *two* layers of indirection there, not three. – bitmask Aug 23 '12 at 17:15
@bitmask: What is a handle (As in a computer science handle not a Windows Handle)? Once you answer that question you will understand why this-is a three indirections. – Martin York Aug 23 '12 at 17:17
It might be useful to clarify in your post. Perhaps. – bitmask Aug 23 '12 at 17:24
@bitmask: If you understand computer science fundamentals then it it is crystal clear. If you don't then there is little point clarifying. – Martin York Aug 23 '12 at 17:39

C triple dereferencing

5 Answers5