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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>Hyperlinked ECMA C# Language Specification</title><meta name="author" content="Jon Jagger" /><link rel="stylesheet" href="ecma334.css"></link></head><body><div align="right"><em><a href="http://www.jaggersoft.com">Jon Jagger</a></em></div><div align="right"><a href="mailto:jon@jaggersoft.com">jon@jaggersoft.com</a></div><form method="get" action="http://search.atomz.com/search/"><input size="30" name="sp-q"></input><input type="submit" value="Search C# Spec"></input><input type="hidden" name="sp-a" value="sp10024177"></input><input type="hidden" name="sp-f" value="ISO-8859-1"></input></form><a href="toc.htm">Table of Contents</a> <a href="1.htm">1</a> <a href="2.htm">2</a> <a href="3.htm">3</a> <a href="4.htm">4</a> <a href="5.htm">5</a> <a href="6.htm">6</a> <a href="7.htm">7</a> <a href="8.htm">8</a> <a href="9.htm">9</a> <a href="10.htm">10</a> <a href="11.htm">11</a> <a href="12.htm">12</a> <a href="13.htm">13</a> <a href="14.htm">14</a> <a href="15.htm">15</a> <a href="16.htm">16</a> <a href="17.htm">17</a> <a href="18.htm">18</a> <a href="19.htm">19</a> <a href="20.htm">20</a> <a href="21.htm">21</a> <a href="22.htm">22</a> <a href="23.htm">23</a> <a href="24.htm">24</a> <a href="25.htm">25</a> <a href="notes.htm">Notes</a> <a href="HyperlinkedCSharpECMA.zip">Download</a><span class="ruler"></span><span class="heading">ECMA-334 C# Language Specification</span><span class="navigate"><a href="14.7.2.htm"><img src="previous.gif" alt="previous" border="0" /></a><a href="14.7.4.htm"><img src="next.gif" alt="next" border="0" /></a></span><span class="clause-depth"><a href="13.htm"><img src="previous.gif" alt="previous at this level" border="0" /></a><a href="15.htm"><img src="next.gif" alt="next at this level" border="0" /></a> <span class="clause-number-link"><a href="14.htm">14</a></span><span class="clause-title-previous"> Expressions</span></span><span class="clause-depth"><a href="14.6.htm"><img src="previous.gif" alt="previous at this level" border="0" /></a><a href="14.8.htm"><img src="next.gif" alt="next at this level" border="0" /></a> <span class="clause-number-link"><a href="14.7.htm">14.7</a></span><span class="clause-title-previous"> Arithmetic operators</span></span><span class="clause-depth"><a href="14.7.2.htm"><img src="previous.gif" alt="previous at this level" border="0" /></a><a href="14.7.4.htm"><img src="next.gif" alt="next at this level" border="0" /></a> <span class="clause-number">14.7.3</span><span class="clause-title"> Remainder operator</span></span><span class="locator">
Paragraph 1</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P1S1"></a>For an operation of the form x % y, binary operator overload resolution (<a href="14.2.4.htm">§14.2.4</a>) is applied to select a specific operator implementation.</span> <span class="sentence"><span class="sentence-number">2</span> <a name="P1S2"></a>The operands are converted to the parameter types of the selected operator, and the type of the result is the return type of the operator.</span> </span><span class="locator">
Paragraph 2</span><span class="paragraph"><span class="sentence"><span class="sentence-number">1</span> <a name="P2S1"></a>The predefined remainder operators are listed below.</span> <span class="sentence"><span class="sentence-number">2</span> <a name="P2S2"></a>The operators all compute the remainder of the division between x and y.</span> <ul><li><span class="sentence"><span class="sentence-number">3</span> <a name="P2S3"></a> Integer remainder: <pre class="code-example">
int operator %(int x, int y);
uint operator %(uint x, uint y);
long operator %(long x, long y);
ulong operator %(ulong x, ulong y);
</pre><span class="sentence"><span class="sentence-number">4</span> <a name="P2S4"></a>The result of x % y is the value produced by x -(x / y) * y.</span> <span class="sentence"><span class="sentence-number">5</span> <a name="P2S5"></a>If y is zero, a System.DivideByZeroException is thrown.</span> <span class="sentence"><span class="sentence-number">6</span> <a name="P2S6"></a>The remainder operator never causes an overflow.</span> </span></li><li><span class="sentence"><span class="sentence-number">7</span> <a name="P2S7"></a> Floating-point remainder: <pre class="code-example">
float operator %(float x, float y);
double operator %(double x, double y);
</pre><span class="sentence"><span class="sentence-number">8</span> <a name="P2S8"></a>The following table lists the results of all possible combinations of nonzero finite values, zeros, infinities, and NaN's.</span> <span class="sentence"><span class="sentence-number">9</span> <a name="P2S9"></a>In the table, x and y are positive finite values.</span> z is the result of x % y and is computed as x -n * y, where n is the largest possible integer that is less than or equal to x / y.</span> <span class="sentence"><span class="sentence-number">10</span> <a name="P2S10"></a>This method of computing the remainder is analogous to that used for integer operands, but differs from the IEEE 754 definition (in which n is the integer closest to x / y).</span>
<table border="1">
<tr>
<th>%</th>
<th>+y</th>
<th>-y</th>
<th>+0</th>
<th>-0</th>
<th>+∞</th>
<th>-∞</th>
<th>NaN</th>
</tr>
<tr>
<th>+x</th>
<td>+z</td>
<td>+z</td>
<td>NaN</td>
<td>NaN</td>
<td>x</td>
<td>x</td>
<td>NaN</td>
</tr>
<tr>
<th>-x</th>
<td>-z</td>
<td>-z</td>
<td>NaN</td>
<td>NaN</td>
<td>-x</td>
<td>-x</td>
<td>NaN</td>
</tr>
<tr>
<th>+0</th>
<td>+0</td>
<td>+0</td>
<td>NaN</td>
<td>NaN</td>
<td>+0</td>
<td>+0</td>
<td>NaN</td>
</tr>
<tr>
<th>-0</th>
<td>-0</td>
<td>-0</td>
<td>NaN</td>
<td>NaN</td>
<td>-0</td>
<td>-0</td>
<td>NaN</td>
</tr>
<tr>
<th>+∞</th>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
</tr>
<tr>
<th>-∞</th>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
</tr>
<tr>
<th>NaN</th>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
<td>NaN</td>
</tr>
</table>
</li><li><span class="sentence"><span class="sentence-number">11</span> <a name="P2S11"></a> Decimal remainder: <pre class="code-example">
decimal operator %(decimal x, decimal y);
</pre><span class="sentence"><span class="sentence-number">12</span> <a name="P2S12"></a>If the value of the right operand is zero, a System.DivideByZeroException is thrown.</span> <span class="sentence"><span class="sentence-number">13</span> <a name="P2S13"></a>If the resulting value is too large to represent in the <span class="keyword">decimal</span> format, a System.OverflowException is thrown.</span> <span class="sentence"><span class="sentence-number">14</span> <a name="P2S14"></a>If the result value is too small to represent in the <span class="keyword">decimal</span> format, the result is zero.</span> <span class="sentence"><span class="sentence-number">15</span> <a name="P2S15"></a>The scale of the result, before any rounding, is the same as the scale of y, and the sign of the result, if non-zero, is the same as that of x.</span> <span class="sentence"><span class="sentence-number">16</span> <a name="P2S16"></a>Decimal remainder is equivalent to using the remainder operator of type System.Decimal.</span> </span></li></ul></span><span class="ruler"></span><table><tr><td><table align="left" bgcolor="navy"><tr bgcolor="navy"><td><font face="Arial,sans-serif" size="6" color="yellow"><strong>{ JSL }</strong></font></td></tr></table></td></tr><tr><td><font face="Arial,sans-serif" size="2" color="navy"><strong>Jagger Software Ltd</strong></font></td></tr><tr><td><font face="Arial,sans-serif" size="2" color="navy"><strong>Company # 4070126</strong></font></td></tr><tr><td><font face="Arial,sans-serif" size="2" color="navy"><strong>VAT # 762 5213 42</strong></font></td></tr></table><img src="valid-html401.png" align="left" height="31" width="88" alt="Valid HTML 4.01" /><img src="vcss.gif" align="left" height="31" width="88" alt="Valid CSS" /></body></html>⌨️ 快捷键说明
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