P-tree retrieval of head of queue (
Pascal version
available)
typekey inspect( pq ) tree pq; { if ( pq == NULL ) Error /*** Inspecting an empty queue ***/; while ( pq->left != NULL ) pq = pq->left; return( pq->k ); };
C
source (512.insp.c)
Pascal
source (512.insp.p)
©
Addison-Wesley
Publishing Co. Inc.
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C source (512.insp.c) 