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    <p>first of all, I would not try to put code like this one in production. Things can be done more simple, clear, performant and less error prone.</p> <p>I've "fixed" your program by changing things in as little as possible places. It must be clear that this doesn't make things more elegant. Only rethinking and rewriting would make things more elegant.</p> <p>The error you have (both in the first and the second program) is the routine popQueue.</p> <ol> <li><p>You return nothing in the else clause. You should "return NULL". This is at least sloppy programming.</p></li> <li><p>The routines return 1 2 3 4 5 5 and 1 2 2 for a queue. This is because Q->CurrentValue points to the first place in the theQueue array, and you shift up all values. This means that CurrentValue defacto points to the next value.</p></li> </ol> <p>The solution (again: it's not elegant, nor would I put it in production, but it is with minimal change to the original) to your problem is:</p> <ol> <li><p>Change in the struct (to hold the real CurrentValue)</p> <pre><code>struct queue { int* pointer; int currentValue; int max, count, theQueue[Q_MAX_SIZE]; }; </code></pre></li> <li><p>Change the routine popQueue</p> <pre><code>int* popQueue(struct queue *Q) { int i; if (Q-&gt;count &gt; 0) { Q-&gt;currentValue = *Q-&gt;theQueue; Q-&gt;pointer--; Q-&gt;count--; for (i = 0; i &lt; Q-&gt;count; i++) { int* currentPtr = Q-&gt;theQueue + i; int* nextPtr = currentPtr + 1; *currentPtr = *nextPtr; } return &amp;(Q-&gt;currentValue); } else return NULL; } </code></pre></li> </ol> <p>Kind regards, PB</p>
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    1. POsingle Queue and multiple Queue using same program not work
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    1. COthanks for the clarification, you don't add any thing new to what the guys **Jim** and **Ingo-leonhardt** says.. anyway i get were the problem is thank you all guys
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