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POUser defined linked list returning pointer from function
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  1. POUser defined linked list returning pointer from function
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    copied!<p>I know i asked a similar question a while back but its still not working. Sorry for repetition i am just not sure why it does not work. I created my own linked list(not using the stl library) I have my classes set up and work perfectly how I want them too. The problem I have is getting a reference back when I use a function to populate the list. in my main I call the function <code>bookSetUp()</code> which is used to populate the list. I make the this function equal to a temp pointer. (Heres the code)<br> <strong>Main.cpp</strong></p> <pre><code>Book* temp = bookSetUp(); while(temp!=NULL) { cout&lt;&lt;temp-&gt;getName()&lt;&lt;endl; cout&lt;&lt;temp-&gt;getAuthor()&lt;&lt;endl; cout&lt;&lt;temp-&gt;getISBN()&lt;&lt;endl; temp = temp-&gt;getNext(); } </code></pre> <p>bookSetUp() is located in another .cpp file called <strong>functions.cpp</strong>(Links are working between the two .cpp's as i have tested them)<br> <strong>functions.cpp</strong><br> <code>Book* bookSetUp()<br> {</code></p> <pre><code>//The items that populate the list Book a("A Tale of Two Cities", "Charles Dickens", 1203456, true); Book b("Lord of the rings", "J.R.R Tolkein", 123456, true); Book c("Le Petit Prince", "Antoine de Saint-Exupéry", 123457, true); Book d("And Then There Were None", "Agatha Christie", 123458, true); Book e("Dream of the Red Chamber","Cao Xueqin",123459, true); Book f("The Hobbit","J.R.R Tolkein",123467, true); a.setPrev(NULL); a.setNext(&amp;b); b.setPrev(&amp;a); b.setNext(&amp;c); c.setPrev(&amp;b); c.setNext(&amp;d); d.setPrev(&amp;c); d.setNext(&amp;e); e.setPrev(&amp;d); e.setNext(&amp;f); f.setPrev(&amp;e); f.setNext(NULL); Book* temp = &amp;a; return temp; } </code></pre> <p>As you can see i am trying to return a pointer to the first item on the list so that main has access to it. My book class has attributes: string name,string author,int isbn and bool availability.<br> The program crashes with <strong>"Unhandled exception at 0x00B16886 in bookRepository.exe: 0xC0000005: Access violation reading location 0xCCCCCD04."</strong> which im guessing means it is not getting a value back from the bookSetUp() function.<br> Also in the debugger the int ISBN returns but not the string(s) or bool.<br> Does anyone know why this is not working? it would be a massive help if you could!</p>
 

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