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<H2>equal_to</H2>
<HR><PRE>     Function Object</PRE><HR>
<A NAME="Summary"><H3>Summary</H3></A>
<P>Binary function object that returns <SAMP>true</SAMP> if its first argument equals its second</P>
<H3>Contents</H3>
<UL>
<A HREF="#Synopsis"><LI>Synopsis</LI></A>
<A HREF="#Description"><LI>Description</LI></A>
<A HREF="#Interface"><LI>Interface</LI></A>
<A HREF="#See Also"><LI>See Also</LI></A>
</UL>
<A NAME="Synopsis"><H3>Synopsis</H3></A>
<PRE>#include &#60;functional></PRE>
<PRE>
template &#60;class T>
struct<B> equal_to;</B>
</PRE>
<A NAME="Description"><H3>Description</H3></A>
<P><B><I>equal_to</B></I> is a binary function object.  Its <SAMP>operator()</SAMP> returns <SAMP>true</SAMP> if <SAMP>x</SAMP> is equal to <SAMP>y</SAMP>.  You can pass an <B><I>equal_to</B></I> object to any algorithm that requires a binary function.  For example, the <A HREF="tra_4787.htm"><B><I>transform</B></I></A> algorithm applies a binary operation to corresponding values in two collections and stores the result.   <B><I>equal_to</B></I> would be used in that algorithm in the following manner:</P>
<PRE>vector&#60;int> vec1;</PRE>
<PRE>vector&#60;int> vec2;
vector&#60;int> vecResult;
.
.
.
transform(vec1.begin(), vec1.end(),
          vec2.begin(), vecResult.begin(), 
          <B>equal_to</B>&#60;int>());
</PRE><P>After this call to <A HREF="tra_4787.htm"><B><I>transform</B></I></A>, <SAMP>vecResult(n)</SAMP> will contain a "1" if <SAMP>vec1(n)</SAMP> was equal to  <SAMP>vec2(n)</SAMP> or a "0" if <SAMP>vec1(n)</SAMP> was not equal to <SAMP>vec2(n)</SAMP>.</P>
<A NAME="Interface"><H3>Interface</H3></A>
<PRE>template &#60;class T></PRE>
<PRE>    struct<B> equal_to </B>: binary_function&#60;T, T, bool> 
{
   typedef typename binary_function&#60;T, T, bool>::second_argument_type 
     second_argument_type;
   typedef typename binary_function&#60;T, T, bool>::first_argument_type 
     first_argument_type;
   typedef typename binary_function&#60;T, T, bool>::result_type 
     result_type;
   bool operator() (const T&#38;, const T&#38;) const;
};</PRE>
<A NAME="See Also"><H3>See Also</H3></A>
<P><A HREF="bin_7851.htm"><B><I>binary_function</B></I></A>, <A HREF="Fun_7437.htm"><B><I>Function Objects</B></I></A></P>
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