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authorTobias Klauser <tklauser@distanz.ch>2008-01-27 11:37:44 +0100
committerTobias Klauser <tklauser@xenon.tklauser.home>2008-01-27 11:37:44 +0100
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+<title>Operator Precedence</title>
+<head>
+
+</head>
+
+<body bgcolor="#ffffcc">
+<hr>
+<center><h1>Operator Precedence</h1></center>
+<hr>
+
+
+The following tables show the order in which operators are evaluated.
+Please note the following.
+
+<ul>
+<li>The order in which the operands are evaluated is not specified in
+the ANSII standard.
+
+<li>For readability you should not rely on these rules! Put everything
+in brackets so you intension is clear to the compiler and other
+programmers.
+</ul>
+
+<dl compact>
+
+<dt><img src="../../GRAPHICS/whiteball.gif" width=26 height=14 alt="o" name="summary">
+<a href="#summary">Summary table.</a>
+
+<dt><img src="../../GRAPHICS/whiteball.gif" width=26 height=14 alt="o" name="detail">
+<a href="#detail">Table in detail.</a>
+
+<dt><img src="../../GRAPHICS/whiteball.gif" width=26 height=14 alt="o" name="ops">
+<a href="expressions.html">Operators listed by type.</a>
+</dl>
+
+<hr>
+
+<a name=summary>
+<h2>Summary precedence table.</h2>
+
+All operators on the same line have the same precedence.
+The first line has the highest precedence.
+<p>
+<center>
+<table border=1 center=4 bgcolor=ivory bgcolor=ivory>
+
+<tr align=center><td> () </td><td> [] </td><td> -> </td><td> . </td></tr>
+<tr align=center><td> ! </td><td> ~ </td><td> ++ </td><td> -- </td><td> + </td>
+ <td> - </td><td> * </td><td> & </td><td> sizeof </td> </tr>
+<tr align=center><td> * </td><td> / </td><td> % </td></tr>
+<tr align=center><td> + </td><td> - </td></tr>
+<tr align=center><td> << </td><td> >> </td></tr>
+<tr align=center><td> < </td><td> <= </td><td> >= </td><td> > </td></tr>
+<tr align=center><td> == </td><td> != </td></tr>
+<tr align=center><td> & </td></tr>
+<tr align=center><td> ^ </td></tr>
+<tr align=center><td> | </td></tr>
+<tr align=center><td> && </td></tr>
+<tr align=center><td> || </td></tr>
+<tr align=center><td> ?: </td></tr>
+<tr align=center><td> = </td><td> += </td><td> -= </td><td> *= </td><td> /= </td>
+ <td> %= </td><td> &= </td><td> ^= </td><td> |= </td><td> <<= </td>
+ <td> >>= </td></tr>
+<tr align=center><td> , </td></tr>
+</table>
+</center>
+<p>
+<i>
+Lary Huang has told me that the </i><b>postfix unary --</b><i> and
+</i><b>postfix unary ++</b><i> have a
+higher precedence than the </i><b>prefix unary --</b><i> and
+</i><b>prefix unary ++</b><i>.
+</i>
+<hr>
+
+<a name=detail>
+<h2>Detailed precedence table.</h2>
+
+All operators in the same 'block' have the same precedence. The first block
+has the
+highest precedence.
+<p>
+
+<center>
+<table border=1 bgcolor=ivory>
+<th>Group</th><th>Operator</th><th>Description</th><th>Example</th>
+<tr>
+<td>
+Membership.
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>()</td><td><a href="../SYNTAX/functions.html">Function call.</a></td><td>count = function(4,3);</td>
+</tr>
+
+<tr align=center>
+<td></td><td>[]</td><td><a href="arrays.html">Array.</a></td><td>value = array[5] + increment;</td>
+</tr>
+
+<tr align=center>
+<td></td><td>-></td><td><a href="../SYNTAX/struct.html#pointers">Structure pointer.</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td> .</td><td><a href="../SYNTAX/struct.html#membership">Structure member.</a></td>
+</tr>
+
+<tr align=center>
+<td>
+Unary.
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>!</td><td><a href="../SYNTAX/logical.html#NOT">Logical NOT</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>~ </td><td> </td>
+</tr>
+
+<tr align=center>
+<td></td><td>++</td><td><a href="inc_dec.html">Increment.</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>--</td><td><a href="inc_dec.html">Decrement.</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>+ </td><td></td>
+</tr>
+
+<tr align=center>
+<td></td><td>- </td>
+</tr>
+
+<tr align=center>
+<td></td><td>*</td><td><a href="../EXAMPLES/address.c">Pointer to data</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>&</td><td><a href="../EXAMPLES/address.c">Address of a variable.</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>sizeof</td>
+</tr>
+
+<tr align=center>
+<td></td><td>(type)</td><td><a href="cast.html">type cast.</a></td>
+</tr>
+
+<tr align=center>
+<td>
+Binary.
+</td>
+
+<tr align=center>
+<td></td><td>* </td><td>Multiply.</td>
+</tr>
+
+<tr align=center>
+<td></td><td>/ </td><td>Divide.</td>
+</tr>
+
+<tr align=center>
+<td></td><td>% </td><td><a href="../EXAMPLES/modulo.c">Modulo.</a></td>
+</tr>
+
+<tr align=center>
+<td>
+Binary.
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>+ </td><td>Addition</td>
+</tr>
+
+<tr align=center>
+<td></td><td>- </td><td>Subtraction.</td>
+</tr>
+
+<tr align=center>
+<td>
+Bitwise
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td><< </td><td><a href="bit_shift.html">Shift left.</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>>> </td><td><a href="bit_shift.html">Shift Right.</a></td>
+</tr>
+
+<tr align=center>
+<td>
+Relational.
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>< </td><td>Less than.</td>
+</tr>
+
+<tr align=center>
+<td></td><td>> </td><td>Greater than.</td>
+</tr>
+
+<tr align=center>
+<td></td><td><= </td><td>Less than or equal too.</td>
+</tr>
+
+<tr align=center>
+<td></td><td>>= </td><td>Greater than or equal too.</td>
+</tr>
+
+<tr align=center>
+<td></td><td>== </td><td>Equal too.</td>
+</tr>
+
+<tr align=center>
+<td></td><td>!= </td><td>Not equal too.</td>
+</tr>
+
+<tr align=center>
+<td>
+More Bitwise
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>& </td><td><a href="../CONCEPT/bitwise.html">bitwise AND</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>^ </td><td><a href="../CONCEPT/bitwise.html">bitwise Excusive OR</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>| </td><td><a href="../CONCEPT/bitwise.html">bitwise OR</a></td>
+</tr>
+
+<tr align=center>
+<td>
+Logical.
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>&& </td><td><a href="../SYNTAX/logical.html#AND">Logical AND</a></td>
+</tr>
+
+<tr align=center>
+<td>
+Logical.
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>|| </td><td><a href="../SYNTAX/logical.html#OR">Logical OR</a></td>
+</tr>
+<tr align=center>
+<td>
+Conditional
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>? : </td><td><a href="../SYNTAX/conditional.html">Conditional construct.</a></td>
+</tr>
+
+<tr align=center>
+<td>
+Assignment
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>= </td><td><a href="assignment.html">Equals</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>+= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>-= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>*= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>/= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>%= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>&= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>^= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>|= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td><<= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td></td><td>>>= </td><td><a href="assignment.html">assignment</a></td>
+</tr>
+
+<tr align=center>
+<td>
+Series
+</td>
+</tr>
+
+<tr align=center>
+<td></td><td>, </td><td><a href="../SYNTAX/comma.html">Comma</a></td>
+</tr>
+</table>
+</center>
+
+<p>
+<hr>
+<h2>See also:</h2>
+
+<img src="../../GRAPHICS/whiteball.gif" width=26 height=14 alt="o" name="exp">
+<a href="expressions.html#bit">Expressions and operators.</a>
+<br>
+<img src="../../GRAPHICS/whiteball.gif" width=26 height=14 alt="o" name="ass">
+<a href="../CONCEPT/assignment.html">Assignment Operators.</a>
+<br>
+
+
+<p>
+
+<hr>
+<p>
+<center>
+<table border=2 width="80%" bgcolor="ivory">
+<tr align=center>
+<td width="25%">
+<a href="../cref.html"> Top</a>
+</td><td width="25%">
+<a href="../master_index.html"> Master Index</a>
+</td><td width="25%">
+<a href="../SYNTAX/keywords.html"> Keywords</a>
+</td><td width="25%">
+<a href="../FUNCTIONS/funcref.htm"> Functions</a>
+</td>
+</tr>
+</table>
+</center>
+<p>
+<hr>
+<address>Martin Leslie
+</address><p>
+</body>
+</html>
+
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