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<h1>Directive #define</h1>
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<dl class='group--doc'>
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<dt class='head--type'><span class='homogen--type'>Directive</span>
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<span class='homogen--name'><b>#define</b></span>
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</dt>
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<dd><p><code class='directive'>#define</code></p></dd>
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<dt class='head--doc'>Description</dt>
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<dd class='body--doc'><p>This directive is used to define or redefine a cpp macro.</p>
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<p> The simplest way to use define is to write</p>
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<pre><code>#define <identifier> <replacement string></code></pre><p>which will cause all subsequent occurances of <tt><b><i><identifier</i></b></tt>
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to be replaced with the <tt><i><replacement string></i></tt>.</p>
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<p> Define also has the capability to use arguments, thus a line like</p>
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<pre><code>#define <identifier>(arg1, arg2) <replacement string></code></pre><p>would cause <tt><b><i><identifer></i></b></tt> to be a macro. All occurances of
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'<tt><b><i><identifier></i></b>(something1,something2d)</tt>' would be replaced
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with the <tt><i><replacement string></i></tt>.
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And in the <tt><i><replacement string></i></tt>, <tt>arg1</tt> and <tt>arg2</tt>
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will be replaced with <tt>something1</tt> and <tt>something2</tt>.</p>
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