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append [C++ Reference]
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<h2><a name="append" id="append">append</a></h2>
<div class="level2">
<p>
Syntax:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="co2">#include <string></span>
string<span class="sy0">&</span> append<span class="br0">(</span> <span class="kw4">const</span> string<span class="sy0">&</span> str <span class="br0">)</span><span class="sy0">;</span>
string<span class="sy0">&</span> append<span class="br0">(</span> <span class="kw4">const</span> Char<span class="sy0">*</span> str <span class="br0">)</span><span class="sy0">;</span>
string<span class="sy0">&</span> append<span class="br0">(</span> <span class="kw4">const</span> string<span class="sy0">&</span> str<span class="sy0">,</span> size_type index<span class="sy0">,</span> size_type len <span class="br0">)</span><span class="sy0">;</span>
string<span class="sy0">&</span> append<span class="br0">(</span> <span class="kw4">const</span> Char<span class="sy0">*</span> str<span class="sy0">,</span> size_type num <span class="br0">)</span><span class="sy0">;</span>
string<span class="sy0">&</span> append<span class="br0">(</span> size_type num<span class="sy0">,</span> Char ch <span class="br0">)</span><span class="sy0">;</span>
string<span class="sy0">&</span> append<span class="br0">(</span> input_iterator start<span class="sy0">,</span> input_iterator end <span class="br0">)</span><span class="sy0">;</span></pre>
<p>
The append function either:
</p>
<ul>
<li class="level1"><div class="li"> (1&2)appends <code>str</code> on to the end of the current string,</div>
</li>
<li class="level1"><div class="li"> (3)appends a substring of <code>str</code> starting at <code>index</code> that is <code>len</code> characters long on to the end of the current string,</div>
</li>
<li class="level1"><div class="li"> (4)appends first num characters from str on to string </div>
</li>
<li class="level1"><div class="li"> (5)appends <code>num</code> repetitions of <code>ch</code> on to the end of the current string,</div>
</li>
<li class="level1"><div class="li"> (6)appends the sequence denoted by <code>start</code> and <code>end</code> on to the end of the current string.</div>
</li>
</ul>
<p>
For example, the following code uses append to add 10 copies of the '!' character to a string:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="kw4">string</span> str <span class="sy0">=</span> <span class="st0">"Hello World"</span><span class="sy0">;</span>
str.<span class="me1">append</span><span class="br0">(</span> <span class="nu0">10</span><span class="sy0">,</span> <span class="st0">'!'</span> <span class="br0">)</span><span class="sy0">;</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> str <span class="sy0"><<</span> endl<span class="sy0">;</span></pre>
<p>
That code displays:
</p>
<pre class="code">
Hello World!!!!!!!!!!</pre>
<p>
In the next example, append() is used to concatenate a substring of one string onto another string:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="kw4">string</span> str1 <span class="sy0">=</span> <span class="st0">"Eventually I stopped caring... "</span><span class="sy0">;</span>
<span class="kw4">string</span> str2 <span class="sy0">=</span> <span class="st0">"but that was the '80s so nobody noticed."</span><span class="sy0">;</span>
str1.<span class="me1">append</span><span class="br0">(</span> str2<span class="sy0">,</span> 25<span class="sy0">,</span> 15 <span class="br0">)</span><span class="sy0">;</span>
<a href="http://www.opengroup.org/onlinepubs/009695399/functions/cout.html"><span class="kw3">cout</span></a> <span class="sy0"><<</span> <span class="st0">"str1 is "</span> <span class="sy0"><<</span> str1 <span class="sy0"><<</span> endl<span class="sy0">;</span></pre>
<p>
When run, the above code displays:
</p>
<pre class="code">
str1 is Eventually I stopped caring... nobody noticed.</pre>
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