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<H1>replace</H1>

<Table CellPadding=0 CellSpacing=0 width=100%>
<TR>
<TD Align=left><Img src = "algorithms.gif" Alt=""   WIDTH = "194"  HEIGHT = "38" ></TD>
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<TR>
<TD Align=left VAlign=top><b>Category</b>: algorithms</TD>
<TD Align=right VAlign=top><b>Component type</b>: function</TD>
</TR>
</Table>

<h3>Prototype</h3>
<pre>
template &lt;class <A href="ForwardIterator.html">ForwardIterator</A>, class T&gt;
void replace(ForwardIterator first, ForwardIterator last, const T&amp; old_value,
             const T&amp; new_value)
</pre>                   
<h3>Description</h3>
<tt>Replace</tt> replaces every element in the range <tt>[first, last)</tt> 
equal to <tt>old_value</tt> with <tt>new_value</tt>.  That is: for every iterator <tt>i</tt>,
if <tt>*i == old_value</tt> then it performs the assignment <tt>*i = new_value</tt>.
<h3>Definition</h3>
Defined in the standard header <A href="algorithm">algorithm</A>, and in the nonstandard
backward-compatibility header <A href="algo.h">algo.h</A>.
<h3>Requirements on types</h3>
<UL>
<LI>
<tt>ForwardIterator</tt> is a model of <A href="ForwardIterator.html">Forward Iterator</A>.
<LI>
<tt>ForwardIterator</tt> is mutable.
<LI>
<tt>T</tt> is convertible to <tt>ForwardIterator</tt>'s value type.
<LI>
<tt>T</tt> is <A href="Assignable.html">Assignable</A>.
<LI>
<tt>T</tt> is <A href="EqualityComparable.html">EqualityComparable</A>, and may be compared for equality with
   objects of <tt>ForwardIterator</tt>'s value type.
</UL>
<h3>Preconditions</h3>
<UL>
<LI>
<tt>[first, last)</tt> is a valid range.
</UL>
<h3>Complexity</h3>
Linear.  <tt>Replace</tt> performs exactly <tt>last - first</tt> comparisons for 
equality, and at most <tt>last - first</tt> assignments.
<h3>Example</h3>
<pre>
<A href="Vector.html">vector</A>&lt;int&gt; V;
V.push_back(1);
V.push_back(2);
V.push_back(3);
V.push_back(1);

replace(V.begin(), V.end(), 1, 99);
assert(V[0] == 99 &amp;&amp; V[3] == 99);
</pre>
<h3>Notes</h3>
<h3>See also</h3>
<tt><A href="replace_if.html">replace_if</A></tt>, <tt><A href="replace_copy.html">replace_copy</A></tt>, <tt><A href="replace_copy_if.html">replace_copy_if</A></tt>

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stl-manual 3.30-13 / usr / share / doc / stl-manual / html / replace.html
