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| 22 | <title>Combining Variable Declarations (GNU C Language Manual)</title>
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| 32 | <link href="Variable-Declarations.html" rel="up" title="Variable Declarations">
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| 57 | <body lang="en">
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| 58 | <span id="Combining-Variable-Declarations"></span><div class="header">
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| 59 | <p>
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| 60 | Previous: <a href="Declaring-Arrays-and-Pointers.html" accesskey="p" rel="prev">Declaring Arrays and Pointers</a>, Up: <a href="Variable-Declarations.html" accesskey="u" rel="up">Variable Declarations</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Symbol-Index.html" title="Index" rel="index">Index</a>]</p>
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| 61 | </div>
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| 62 | <hr>
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| 63 | <span id="Combining-Variable-Declarations-1"></span><h4 class="subsection">20.1.2 Combining Variable Declarations</h4>
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| 64 | <span id="index-combining-variable-declarations"></span>
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| 65 | <span id="index-variable-declarations_002c-combining"></span>
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| 66 | <span id="index-declarations_002c-combining"></span>
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| 67 |
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| 68 | <p>When multiple declarations have the same <var>keywords</var> and
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| 69 | <var>basetype</var>, you can combine them using commas. Thus,
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| 70 | </p>
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| 71 | <div class="example">
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| 72 | <pre class="example"><var>keywords</var> <var>basetype</var>
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| 73 | <var>decorated-variable-1</var> <span class="roman">[</span>= <var>init1</var><span class="roman">]</span>,
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| 74 | <var>decorated-variable-2</var> <span class="roman">[</span>= <var>init2</var><span class="roman">]</span>;
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| 75 | </pre></div>
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| 76 |
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| 77 | <p>is equivalent to
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| 78 | </p>
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| 79 | <div class="example">
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| 80 | <pre class="example"><var>keywords</var> <var>basetype</var>
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| 81 | <var>decorated-variable-1</var> <span class="roman">[</span>= <var>init1</var><span class="roman">]</span>;
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| 82 | <var>keywords</var> <var>basetype</var>
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| 83 | <var>decorated-variable-2</var> <span class="roman">[</span>= <var>init2</var><span class="roman">]</span>;
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| 84 | </pre></div>
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| 85 |
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| 86 | <p>Here are some simple examples:
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| 87 | </p>
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| 88 | <div class="example">
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| 89 | <pre class="example">int a, b;
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| 90 | int a = 1, b = 2;
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| 91 | int a, *p, array[5];
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| 92 | int a = 0, *p = &a, array[5] = {1, 2};
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| 93 | </pre></div>
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| 94 |
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| 95 | <p>In the last two examples, <code>a</code> is an <code>int</code>, <code>p</code> is a
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| 96 | pointer to <code>int</code>, and <code>array</code> is an array of 5 <code>int</code>s.
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| 97 | Since the initializer for <code>array</code> specifies only two elements,
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| 98 | the other three elements are initialized to zero.
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| 99 | </p>
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| 100 |
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| 101 |
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| 102 |
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