result of memcpy(&x[0], "fsd", 3)
<pre><code>        string x;
 78     x.reserve(100);
 79     x[0] = '1';
 80     x[1] = '2';
 81     x[2] = '\0';
 82     x.resize(3);
 83     cout &lt;&lt; "sdfs: " &lt;&lt; x.c_str() &lt;&lt; endl;
 84     cout &lt;&lt; &amp;x[0] &lt;&lt; endl;
 85     return 0
</code></pre>

<p>test result: print nothing</p>
