What is the size of pointers in c++? : <p>What is the size of pointers in c++?</p>

<pre><code>char a;
char *b=a;
cout&lt;&lt;sizeof(b);
</code></pre>

<p>Output is 2 I don't know why.</p>

<pre><code>cout&lt;&lt;sizeof(const);    //o/p is 2
 cout&lt;&lt;sizeof(NULL);   //o/p is 2
</code></pre>
