title: Inheriting from std:: vector
body: <p>I am currently creating a class that has to be derived from std:: vector. I realize its probably bad to do this but I'm required to. Now my question is how do you access the created vector in the member functions to basically make the class access itself like a regular vector of integers? For example I am looking for the equivalent of myVector.at(0) to return the first term in the vector. Also, the size of the vector should always be 6. Here is the code I have so far:</p>
  
  <pre><code>class aHistogram : public vector&lt;int&gt;
  {
  public:
      aHistogram(); //default constructor for histogram class
      void update(int face); //Function to update histogram
      void display(int maxLengthOfLine); //Displays histogram to the scale of maxLengthOfLine using    x's
      void clear();//Function to clear histogram bin counts
      int count(int face) const; // Function to return number of times a face has appeared
  private:
      int numx, m, j; //Variables used in functions
  };
  
  #endif
  </code></pre>
  
  <p>The function that requires the class to access itself is below, I know there is no vector called "myVector" but what I'm lost about is the equivalent syntax to be able to perform the operation.</p>
  
  <pre><code>void aHistogram::clear() 
  {
      //Clears bin counts to 0
      myVector.at(0) = 0;
      myVector.at(1) = 0; 
      myVector.at(2) = 0;
      myVector.at(3) = 0;
      myVector.at(4) = 0;
      myVector.at(5) = 0;
  }
  </code></pre>