title: C++ concatenate two int arrays into one larger array
body: <p>Is there a way to take two int arrays in C++</p>
  
  <pre><code>int * arr1;
  int * arr2;
  //pretend that in the lines below, we fill these two arrays with different
  //int values
  </code></pre>
  
  <p>and then combine them into one larger array that contains both arrays' values?</p>