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CS215queue(2o5)

CS215queue(2o5) - #include using namespace...

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Sheet1 Page 1 #include <iostream> using namespace std #include "CS215queue.h" CS215queue::CS215queue( ) // CONSTRUCTOR { qFront = NULL // Initialize to empty queue qRear = NULL } bool CS215queue::IsEmpty( ) const // Returns true if queue empty // Pre: queue exsists // Post: return true if elements in queue { return ( qFront == NULL ) } bool CS215queue::IsFull( ) const // Returns true if queue full // Pre: queue exsists // Post: Always return false // Linked list queue cannot be full { return ( false ) } void CS215queue::Enqueue( int newItem ) // Adds newItem to the rear of the queue. // Pre: Queue has been initialized. // Queue is not full. // newItem is elemnet to add to queue // Post: newItem is at rear of queue. { NodeType* ptr ptr = new NodeType // Get new node ptr->info = newItem // Put in data ptr->next = NULL // End of list if ( qRear == NULL ) // Empty queue? qFront = ptr // point to this node else qRear->next = ptr // queue at end qRear = ptr // this node is at rear } void CS215queue::Dequeue( int& item ) // Removes element from from front of queue // and returns it in item. // Pre: Queue has been initialized. // Queue is not empty.
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