<div>
If that is the case, why is it allowing me to access elemet 8 of the inner vector ?
</div>


If that is the case, why is it allowing me to access elemet 8 of the inner vector ?

<div>
vector&lt;vector&lt;int&gt; &gt;&nbsp;myVec(10,vector&lt;int&gt;(8));<br />
cout &lt;&lt;&nbsp;myVec[9][8] &lt;&lt;&nbsp;endl;<br />
0<br />
Program exited normally.<br />
(gdb) <br />

</div>


vector<vector<int> > myVec(10,vector<int>(8));
cout << myVec[9][8] << endl;
0
Program exited normally.
(gdb)


<div>
&gt;&gt; If that is the case, why is it allowing me to access elemet 8 of the inner vector ?<br />
<br />
It's not because it might work in some cases that it's not wrong.
</div>


>> If that is the case, why is it allowing me to access elemet 8 of the inner vector ?

It's not because it might work in some cases that it's not wrong.

<div>
<div class="content wysiwyg-content">
Is my misunderstanding of C++ vectors flawed ?<br />
<br />
vector&lt;vector&lt;int&gt; &gt;&nbsp;myVec(10,vector&lt;int&gt;(8));<br />
cout &lt;&lt;&nbsp;myVec[9][8] &lt;&lt;&nbsp;endl;<br />
cout &lt;&lt;&nbsp;myVec[10][8] &lt;&lt;&nbsp;endl;<br />
<br />
0<br />
Bus error<br />
<br />
<br />
What's up with element 10 ?
</div>
</div>


Is my misunderstanding of C++ vectors flawed ?

vector<vector<int> > myVec(10,vector<int>(8));
cout << myVec[9][8] << endl;
cout << myVec[10][8] << endl;

0
Bus error


What's up with element 10 ?

Vectors of Vectors

C++ is an intermediate-level general-purpose programming language, not to be confused with C or C#. It was developed as a set of extensions to the C programming language to improve type-safety and add support for automatic resource management, object-orientation, generic programming, and exception handling, among other features.