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| 22 | <title>Order of Execution (GNU C Language Manual)</title>
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| 58 | <span id="Order-of-Execution"></span><div class="header">
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| 59 | <p>
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| 60 | Next: <a href="Primitive-Types.html" accesskey="n" rel="next">Primitive Types</a>, Previous: <a href="Binary-Operator-Grammar.html" accesskey="p" rel="prev">Binary Operator Grammar</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</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="Order-of-Execution-1"></span><h2 class="chapter">10 Order of Execution</h2>
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| 64 | <span id="index-order-of-execution"></span>
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| 65 |
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| 66 | <p>The order of execution of a C program is not always obvious, and not
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| 67 | necessarily predictable. This chapter describes what you can count on.
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| 68 | </p>
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| 69 | <table class="menu" border="0" cellspacing="0">
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| 70 | <tr><td align="left" valign="top">• <a href="Reordering-of-Operands.html" accesskey="1">Reordering of Operands</a></td><td> </td><td align="left" valign="top">Operations in C are not necessarily computed
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| 71 | in the order they are written.
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| 72 | </td></tr>
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| 73 | <tr><td align="left" valign="top">• <a href="Associativity-and-Ordering.html" accesskey="2">Associativity and Ordering</a></td><td> </td><td align="left" valign="top">Some associative operations are performed
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| 74 | in a particular order; others are not.
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| 75 | </td></tr>
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| 76 | <tr><td align="left" valign="top">• <a href="Sequence-Points.html" accesskey="3">Sequence Points</a></td><td> </td><td align="left" valign="top">Some guarantees about the order of operations.
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| 77 | </td></tr>
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| 78 | <tr><td align="left" valign="top">• <a href="Postincrement-and-Ordering.html" accesskey="4">Postincrement and Ordering</a></td><td> </td><td align="left" valign="top">Ambiguous excution order with postincrement.
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| 79 | </td></tr>
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| 80 | <tr><td align="left" valign="top">• <a href="Ordering-of-Operands.html" accesskey="5">Ordering of Operands</a></td><td> </td><td align="left" valign="top">Evaluation order of operands
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| 81 | and function arguments.
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| 82 | </td></tr>
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| 83 | <tr><td align="left" valign="top">• <a href="Optimization-and-Ordering.html" accesskey="6">Optimization and Ordering</a></td><td> </td><td align="left" valign="top">Compiler optimizations can reorder operations
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| 84 | only if it has no impact on program results.
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| 85 | </td></tr>
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| 86 | </table>
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| 87 |
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| 90 |
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