Hello Neil.

28 Jun 04 17:18, you wrote to all:

 NH> 9.    Consider the following snippet of C code for looking up the size
 NH> of a user's address book.   Assume that fetchEntries( ) and
 NH> freeEntries( ) are already written and do the right thing (allocate an
 NH> array of entries and fill in the correctly allocated array,
 NH> respectively):

 NH> int fetchEntries( int userid, int * countp, entry_t ** entrypp );
 NH> int freeEntries( entry_t * entryp );

 NH> int getEntryCount( int userid, int * countp) {
 NH>     int       count;
 NH>     entry_t * entryp;
 NH>     int       errcode;
 NH>     errcode = fetchEntries( userid, &count, &entryp );

 NH>     if (errcode) return(errcode);

 NH>     freeEntries(entryp);
 NH>     countp = &count;

should be  *countp = count;

 NH>     return 0;
 NH> }

that's answer 'd'


 NH> 10.  How could you fix this code to work correctly?

 NH>     b)  Dereference countp before assigning it to count (instead of
 NH> assigning countp directly).

Is that an attempt to describe the change I gave above? (C I undestand,
English still gives me trouble occasionally)

 NH>     d)  Pass in &entryCount to fetchEntries( ) instead of &count.

If the examiner means pass in countp instead of &count that would work,
except possinly when there's an error.


Jasen

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