https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&feed=atom&action=history
Basic Pascal Tutorial/Chapter 4/Recursion/zh CN - Revision history
2024-03-29T10:27:14Z
Revision history for this page on the wiki
MediaWiki 1.35.6
https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&diff=153875&oldid=prev
Kai Burghardt: bypass language bar/categorization template redirect [cf. discussion]
2022-08-20T14:20:03Z
<p>bypass language bar/categorization template redirect [cf. <a href="/Special:PermanentLink/149778#Cluttering_of_main_name_space" title="Special:PermanentLink/149778">discussion</a>]</p>
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Kai Burghardt
https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&diff=153105&oldid=prev
Kai Burghardt: bypass [previously missed] redirect [cf. discussion]
2022-08-06T12:37:33Z
<p>bypass [previously missed] redirect [cf. <a href="/Special:PermanentLink/149778#Cluttering_of_main_name_space" title="Special:PermanentLink/149778">discussion</a>]</p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>|[[Basic Pascal Tutorial/Chapter 4/Forward Referencing/zh_CN|下一页]]</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>|[[Basic Pascal Tutorial/Chapter 4/Forward Referencing/zh_CN|下一页]]</div></td></tr>
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Kai Burghardt
https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&diff=152968&oldid=prev
Kai Burghardt: bypass redirects [cf. discussion]
2022-08-06T00:17:33Z
<p>bypass redirects [cf. <a href="/Special:PermanentLink/149778#Cluttering_of_main_name_space" title="Special:PermanentLink/149778">discussion</a>]</p>
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<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>|[[Scope/zh_CN|上一页]]</div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>|[[<ins class="diffchange diffchange-inline">Basic Pascal Tutorial/Chapter 4/</ins>Scope/zh_CN|上一页]]</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>|[[Contents/zh_CN|目录]]</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>|[[Contents/zh_CN|目录]]</div></td></tr>
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Kai Burghardt
https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&diff=150489&oldid=prev
Kai Burghardt: Kai Burghardt moved page Recursion/zh CN to Basic Pascal Tutorial/Chapter 4/Recursion/zh CN: tidy up main name space: create subpage hierarchy for basic Pascal tutorial [cf. [[Special: PermaLink/14...
2022-02-03T01:59:22Z
<p>Kai Burghardt moved page <a href="/Recursion/zh_CN" class="mw-redirect" title="Recursion/zh CN">Recursion/zh CN</a> to <a href="/Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN" title="Basic Pascal Tutorial/Chapter 4/Recursion/zh CN">Basic Pascal Tutorial/Chapter 4/Recursion/zh CN</a>: tidy up main name space: create subpage hierarchy for <a href="/Category:Basic_Pascal_Introduction/zh_CN" title="Category:Basic Pascal Introduction/zh CN">basic Pascal tutorial</a> [cf. [[Special: PermaLink/14...</p>
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<td colspan="1" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 01:59, 3 February 2022</td>
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Kai Burghardt
https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&diff=133067&oldid=prev
Trev: Fixed syntax highlighting; removed categories included in template
2020-02-25T06:30:00Z
<p>Fixed syntax highlighting; removed categories included in template</p>
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</tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l8" >Line 8:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Summation(求和)函数,数学中通过一个大写的[http://zh.wikipedia.org/wiki/%E6%B1%82%E5%92%8C%E7%AC%A6%E5%8F%B7 Sigma]]来指定。常见的递归例子:</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Summation(求和)函数,数学中通过一个大写的[http://zh.wikipedia.org/wiki/%E6%B1%82%E5%92%8C%E7%AC%A6%E5%8F%B7 Sigma]]来指定。常见的递归例子:</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><syntaxhighlight></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><syntaxhighlight <ins class="diffchange diffchange-inline">lang=pascal</ins>></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>function Summation (num : integer) : integer;</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>function Summation (num : integer) : integer;</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>begin</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>begin</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>假设你求3的和。</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>假设你求3的和。</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><syntaxhighlight></div></td><td class='diff-marker'>+</td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><syntaxhighlight <ins class="diffchange diffchange-inline">lang=pascal</ins>></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>a := Summation(3);</div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>a := Summation(3);</div></td></tr>
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Trev
https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&diff=91147&oldid=prev
FTurtle at 21:23, 22 June 2015
2015-06-22T21:23:35Z
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FTurtle
https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&diff=74806&oldid=prev
Swen at 14:56, 17 December 2013
2013-12-17T14:56:27Z
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Swen
https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&diff=74786&oldid=prev
Wangyouworld at 06:12, 17 December 2013
2013-12-17T06:12:57Z
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Wangyouworld
https://wiki.freepascal.org/index.php?title=Basic_Pascal_Tutorial/Chapter_4/Recursion/zh_CN&diff=74783&oldid=prev
Wangyouworld: Created page with "4E - 递归调用 (原作者: Tao Yue, 状态: 未更改) ''递归''较之难以掌握,不过,一旦你了解后,它变得很容易。本章将涉及递归知识。 ..."
2013-12-17T06:08:19Z
<p>Created page with "4E - 递归调用 (原作者: Tao Yue, 状态: 未更改) ''递归''较之难以掌握,不过,一旦你了解后,它变得很容易。本章将涉及递归知识。 ..."</p>
<p><b>New page</b></p><div>4E - 递归调用 (原作者: Tao Yue, 状态: 未更改)<br />
<br />
''递归''较之难以掌握,不过,一旦你了解后,它变得很容易。本章将涉及递归知识。<br />
<br />
递归是指允许一个函数或过程调用自身。调用自身,直到达到限制。<br />
<br />
Summation(求和)函数,数学中通过一个大写的[http://zh.wikipedia.org/wiki/%E6%B1%82%E5%92%8C%E7%AC%A6%E5%8F%B7 Sigma]]来指定。常见的递归例子:<br />
<syntaxhighlight><br />
function Summation (num : integer) : integer;<br />
begin<br />
if num = 1 then<br />
Summation := 1<br />
else<br />
Summation := Summation(num-1) + num<br />
end;<br />
</syntaxhighlight><br />
<br />
假设你求3的和。<br />
<br />
<syntaxhighlight><br />
a := Summation(3);<br />
</syntaxhighlight><br />
<br />
* Summation(3) 变成 Summation(2) + 3<br />
* Summation(2) 变成 Summation(1) + 2<br />
* 为1时, 递归停止,变为 1<br />
* Summation(2) 变成 1 + 2 = 3<br />
* Summation(3) 变成 3 + 3 = 6<br />
* a 为 6<br />
<br />
Recursion works backward until a given point is reached at which an answer is defined, and then works forward with that definition, solving the other definitions which rely upon that one.<br />
<br />
All recursive procedures/functions should have some sort of test so stop the recursion. Under one condition, called the base condition, the recursion should stop. Under all other conditions, the recursion should go deeper. In the example above, the base condition was <tt>if num = 1</tt>. If you don't build in a base condition, the recursion will either not take place at all, or become infinite.<br />
<br />
<strike>递归,常常是把解决原问题按顺序逐次调用同一“子程序”(过程)去处理,最后一次调用得到已知数据,执行完该次调用过程的处理,将结果带回,按“先进后出”原则,依次计算返回。<br />
<br />
递归表现在处理问题的强大能力。然而,如同循环一样,递归也会带来无终止调用的可能性,因此,在设计递归过程(函数)时,必须考虑递归调用的终止问题,就是递归调用要受限于某一条件,而且要保证这个条件在一定情况下肯定能得到满足。</strike><br />
<br />
在上面的例子中,终止递归的条件是num=1。如果没有返回条件,递归要么不会发生,要么变得无限大。<br />
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Wangyouworld