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<H2>18.1 Overview</H2>
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<P>The C++ Standard Library provides a set of classes for reporting errors. These classes use the exception handling facility of the language. The library implements a particular error model, which divides errors in two broad categories: <I>logic errors</I> and <I>runtime errors</I>.</P>
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<P><I>Logic errors</I> are errors caused by problems in the internal logic of the program. They are generally preventable.</P>
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<P><I>Runtime errors</I>, on the other hand, are generally not preventable, or at least not predictable. These are errors generated by circumstances outside the control of the program, such as peripheral hardware faults.</P>
<A NAME="1811"><H3>18.1.1 Include Files</H3></A>
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<P>Programs that use the exception handling classes must include the following header file:</P>

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#include &lt;stdexcept&gt;
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