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POUnable to make a vector of pointers
 

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  1. POUnable to make a vector of pointers
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    <p>For the last two or three hours I have been wrestling with this problem without any luck. I am reading in the text and then trying to make an adjacency list with all vertices having a link to the adjacent vertices in the list. The vertex class look like this:</p> <pre><code>class Vertex { private: std::vector&lt;Vertex*&gt; connPtrVertices; // vector of vertices adjacent to this one public: void addVertex(Vertex* vert) { connPtrVertices.push_back(vert); } </code></pre> <p>And in main.cpp I am trying to connect the vertices to each other like this: </p> <pre><code>Vertex *v1, *v2; v2-&gt;addVertex(v1); // connect v2 to v1 v1-&gt;addVertex(v2); // connect v1 to v2 </code></pre> <p>I am getting a Debug Assertion Failed message which is:</p> <pre><code>Debug Assertion Failed! Program: C:\Windows\system32\MSVCP110D.dll File: c:\program files (x86)\microsoft visual studio 11.0\vc\include\vector Line: 240 Expression: vector iterators incompatible </code></pre> <p>I have no clue what to do, any help will be greatly appreciated.</p> <p>Edit: The first time through the loop I am assigning v1 and v2 with new but then the second time I check if they exist and if they do I assign a pointer to Vertex like this:</p> <pre><code>v1 = &amp;(p_graph-&gt;getVertex(vert1)); </code></pre> <p>The method that is called is this:</p> <pre><code>Vertex Graph::getVertex(std::string v) { // gets the vertex for (std::vector&lt;Vertex&gt;::iterator it = vertices.begin(); it != vertices.end(); it++) { if ((it-&gt;getName()).compare(v) == 0) return *it; // if strings are the same return vertex } exit(1); } </code></pre> <p>Is this where the mistake is?</p>
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    1. USNapalidon
    1. USNapalidon
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    1. COyou never initialized Vertex v1 or v2.
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      1. POUnable to make a vector of pointers
      1. USTodd Withers
    2. COLearn to use your debugger, and please post the relevant code.
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      1. POUnable to make a vector of pointers
      1. USDavid Hammen
    3. COThe code you've posted isn't complete (nor minimal, nor self-consistent), and we don't know what line 240 is, so it's impossible to tell whether the problem is that `vertices` isn't really a `vector<Vertex>`, or something else entirely. When you ask a question, prepare a [minimal complete example](http://sscce.org), and when you write code, build up slowly from the simple to the complex, testing at every step.
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      1. POUnable to make a vector of pointers
      1. USBeta
 

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