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<p>If the declarator or type specifier that declares the identifier appears outside of any block or list of parameters, the identifier has file scope, which terminates at the end of the translation unit.
</p><p>So, placement of an identifier's declaration (in a declarator or type specifier) outside any block or list of parameters means that the identifier has file scope. File scope of an identifier extends from the declaration to the end of the translation unit in which the declaration appears.
</p>
<h3><span class="editsection">[<a href="http://en.cppreference.com/mwiki/index.php?title=c/language/file_scope&action=edit&section=1" title="Edit section: Example">edit</a>]</span> <span class="mw-headline" id="Example">Example</span></h3>
<div class="t-example"><p> Identifiers a, b, f, and g have file scope.
</p><div class="t-example-live-link"><div class="coliru-btn coliru-btn-run-init">Run this code</div></div>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="c source-c"><pre class="de1"><span class="co2">#include <stdio.h></span>
 
<span class="kw4">int</span> a <span class="sy1">=</span> <span class="nu0">1</span><span class="sy4">;</span>
<span class="kw4">static</span> <span class="kw4">int</span> b <span class="sy1">=</span> <span class="nu0">2</span><span class="sy4">;</span>
 
<span class="kw4">void</span> f <span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span> <span class="br0">{</span><a href="../io/fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">"from function f()<span class="es1">\n</span>"</span><span class="br0">)</span><span class="sy4">;</span><span class="br0">}</span>
<span class="kw4">static</span> <span class="kw4">void</span> g <span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span> <span class="br0">{</span><a href="../io/fprintf.html"><span class="kw851">printf</span></a><span class="br0">(</span><span class="st0">"from function g()<span class="es1">\n</span>"</span><span class="br0">)</span><span class="sy4">;</span><span class="br0">}</span>
 
<span class="kw4">int</span> main<span class="br0">(</span><span class="kw4">void</span><span class="br0">)</span>
<span class="br0">{</span>
f<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
g<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
 
<span class="kw1">return</span> <span class="nu0">0</span><span class="sy4">;</span>
<span class="br0">}</span>
<span class="coMULTI">/* end of this translation unit, end of file scope */</span></pre></div></div>
<p>Possible output:
</p>
<div dir="ltr" class="mw-geshi" style="text-align: left;"><div class="text source-text"><pre class="de1">from function f()
from function g()</pre></div></div>
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