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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="../index-2.html">cppreference.com</a> > <a href=
"index.html">C++ I/O</a> > <a href="getline.html">getline</a>
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<div class="name-format">
getline
</div>
<div class="syntax-name-format">
Syntax:
</div>
<pre class="syntax-box">
#include <fstream>
istream& getline( char* buffer, streamsize num );
istream& getline( char* buffer, streamsize num, char delim );
</pre>
<p>The getline() function is used with input streams, and reads
characters into <em>buffer</em> until either:</p>
<ul>
<li><em>num</em> - 1 characters have been read,</li>
<li>a newline is encountered,</li>
<li>an <strong>EOF</strong> is encountered,</li>
<li>or, optionally, until the character <em>delim</em> is read. The
<em>delim</em> character is not put into buffer.</li>
</ul>
<p>For example, the following code uses the getline function to
display the first 100 characters from each line of a text file:</p>
<pre class="prettyprint">
ifstream fin("tmp.dat");
int MAX_LENGTH = 100;
char line[MAX_LENGTH];
while( fin.getline(line, MAX_LENGTH) ) {
cout << "read line: " << line << endl;
}
</pre>
<p>If you'd like to read lines from a file into <a
href="../cppstring/index-2.html">strings</a> instead of character arrays,
consider using the <a href="../cppstring/getline.html">string
getline</a> function.</p>
<p>Those using a Microsoft compiler may find that getline() reads an
extra character, and should consult the documentation on the <a href=
"http://support.microsoft.com/default.aspx?scid=kb;EN-US;q240015">Microsoft
getline bug</a>.</p>
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Related topics:
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<a href="gcount.html">gcount</a><br>
<a href="get.html">get</a><br>
(C++ Strings) <a href="../cppstring/getline.html">getline</a><br>
<a href="ignore.html">ignore</a><br>
<a href="read.html">read</a>
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