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hong  
#1 Posted : Friday, 16 October 2009 11:36:39 AM(UTC)
hong

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Joined: 23/11/2008(UTC)
Posts: 523

When to use a pointer to a pointer?


When a pointer is passed to a function, it is passed by value. The function may modify the local pointer to reference something else, but the original pointer is not affected. To pass the pointer by reference so that the function modifies the original pointer, we need to use a pointer to a pointer, eg. char** ppMyString.


Related: An example of passing by value and reference

Edited by user Saturday, 24 October 2009 1:02:34 AM(UTC)  | Reason: Not specified

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