Why we can directly copy pointers, but we can not directly copy arrays in c++
<p>Theorem says that we cannot initialize an array as a copy of another array. 
But we can initialize pointer as a copy of pointer that points to the first element of another array:</p>

<pre><code>int a[] = {0, 1, 2}; 
int a2[] = a;       //error
int *a3 = a;        //OK
</code></pre>

<p>Why <code>int a2[] = a;</code> is an error?</p>
