Deleting linked lists.

[Stephen Carlson]

In article <846 at saxony.pa.reuter.COM> dgil at pa.reuter.COM (Dave Gillett) writes:
>In <2636 at borg.cs.unc.edu> warner at weiss.cs.unc.edu (Byron Warner) writes:
>>	free(ptr);
>    Even if the value of ptr is not changed by free(), you have absolutely no

Since C is call-by-value, free() cannot change the value of ptr.  However,
free() may release space back to operating system so that a subsequent
inspection of ptr will trap.

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