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<P>&copy;Copyright 1996 Rogue Wave Software</P>
<H2>Fundamental Data Types</H2>
<P>The standard library describes a specific type by providing a specialized  implementation of the<SAMP> numeric_limits</SAMP> class for the type. Static functions and static constant data members then provide information specific to the type.  The standard library includes descriptions of the following fundamental data types.</P>
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<TR VALIGN=top>
<TD>
<SAMP>bool</SAMP><BR>
</TD>

<TD>
<SAMP>char</SAMP><BR>
</TD>

<TD>
<SAMP>int</SAMP><BR>
</TD>

<TD>
<SAMP>float</SAMP><BR>
</TD>
</TR>

<TR VALIGN=top>
<TD>&nbsp;</TD>

<TD>
<SAMP>signed char</SAMP><BR>
</TD>

<TD>
<SAMP>short</SAMP><BR>
</TD>

<TD>
<SAMP>double</SAMP><BR>
</TD>
</TR>

<TR VALIGN=top>
<TD>&nbsp;</TD>

<TD>
<SAMP>unsigned char</SAMP><BR>
</TD>

<TD>
<SAMP>long</SAMP><BR>
</TD>

<TD>
<SAMP>long double</SAMP><BR>
</TD>
</TR>

<TR VALIGN=top>
<TD>&nbsp;</TD>

<TD>
<SAMP>wchar_t</SAMP><BR>
</TD>

<TD>
<SAMP>unsigned short</SAMP><BR>
</TD>

<TD>&nbsp;</TD>
</TR>

<TR VALIGN=top>
<TD>&nbsp;</TD>

<TD>&nbsp;</TD>

<TD>
<SAMP>unsigned int</SAMP><BR>
</TD>

<TD>&nbsp;</TD>
</TR>

<TR VALIGN=top>
<TD>&nbsp;</TD>

<TD>&nbsp;</TD>

<TD>
<SAMP>unsigned long</SAMP><BR>
</TD>

<TD>&nbsp;</TD>
</TR>
</TABLE></CENTER>
<P>Certain implementations may also provide information on other data types. Whether or not an implementation is described can be discovered using the static data member field<SAMP> is_specialized</SAMP>.  For example, the following is legal, and will indicate that the <A HREF="../stdref/str_8586.htm"><B><I>string</I></B></A> data type is not described by this mechanism.</P>
<PRE>cout &#60;&#60; "are strings described " &#60;&#60;
   numeric_limits&#60;string>::is_specialized &#60;&#60; endl;
</PRE>
<P>For data types that do not have a specialization, the values yielded by the  functions and data fields in <SAMP>numeric_limits</SAMP> are generally zero or false.</P>

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