c++ - I am having an issue understanding how to work with queues -

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One of the bottom of my professors have been researching the slides and I have my data structures class and understood on concepts I'm going to have to create a program in my data structure classes with it.

What does. Do you return? We are sending you down the actual tasks: Please explain that I am 6 years ...

ADT-Qi (tool kit function array implementation) 

  / / Create a q of zero create_queue (q and q) {q.back = -1; } // Check that the queue is empty empty (conte queen and que) {return (q.back == -1); } // purify the elements in pure pure (Q and Q) in queue {q.back = -1; } // q Add an element to zero ank (qi and q, const info and item) {++ q.back; Q.i [q.back] = item; // I have previously announced) // a Q-Zero deck (QE & amp; Q, INFOREC & amp; items) {int ct; Item = q.i [0]; Front; // Step forward loop, moving the entire array components to 1 position and transfer points for // (ct = 1; ct & lt; q.back; ++ ct); Q.i [ct -1] = q.i [ct]; --q.back; }   
 
 
 Okay, my guess is that the ADT is designed in such a way that the queue Always indicates the first element and  back  always-1 when there is no element in the queue. Check  
  create_queue , a new queue has been created and no element is yet inaccessible and thus  back  to -1  
 Similarly  empty  is not started, if no element exists, then  back  still -1 will be  
  Purge , all elements are deleted and thus need to update  back  to -1  
 then  ninety < / Code> ..  back  the name of the name If the session is present, then the value will be updated for that  no  -1  
 PS: - This is a wild guess because unless we see the complete code, the prediction Can not do this :)  
     * Edit *** According to the update code, what I suggested works fine, if 1 queue is empty Then back to -1 ... and its one array pointing 0 to n-1 (max_queue_size) ... 0 - & gt; First element

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