Creating std::map instances by specifying key and value data types in runtime
<p>How can I create c++ stl std::map(s) as below by specifying key and value data types in the runtime.</p>

<pre><code>std::map&lt;keyT, valueT&gt;
</code></pre>

<p>The keyT and valueT data types will be definite in runtime and I want to create several map instances according to different data types. How can I do this?</p>
