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📄 字符串全排列(迅雷笔试题) - sinall的专栏 - csdnblog.htm

📁 一份迅雷的笔试题
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id=Anthem_RecentComments_ltlComments__><SPAN id=RecentComments_ltlComments>
<H3 class=listtitle>最近评论</H3>
<UL class=list>
  <LI class=listitem>sinall:<A title=点击查看《回复:为什么C++不允许析构函数抛出异常?》 
  href="http://blog.csdn.net/sinall/archive/2007/04/06/1553697.aspx#733432">根本原因就是:try块中如果有异常的话,局部对象会析构。</A>
  <LI class=listitem>sinall:<A title=点击查看《回复:为什么C++不允许析构函数抛出异常?》 
  href="http://blog.csdn.net/sinall/archive/2007/04/06/1553697.aspx#733430">:-),我没说明白。<BR>catch 
  (Foo e)<BR>...{<BR>// 继续运行这块代码?因为抛出的异常是Foo类型的,所以应该执行这段代码。<BR>}<BR>catch (Bar 
  e)<BR>...{<BR>// 还是继续运行这块代码,难以决断!因为抛出异常的地方,try块局部变……</A>
  <LI class=listitem>zhcen:<A title=点击查看《回复:在ActiveX控件中引入窗体技术(转载)》 
  href="http://blog.csdn.net/sinall/archive/2005/05/23/379021.aspx#733099">把你添加的成员变量 
  用 动态方式创建 就没什么问题了<BR><BR>比如<BR><BR>CHelloDialog* m_pDlgHello;<BR><BR></A>
  <LI class=listitem>jiapei100:<A title=点击查看《回复:为什么C++不允许析构函数抛出异常?》 
  href="http://blog.csdn.net/sinall/archive/2007/04/06/1553697.aspx#731273"><BR>兄弟,这个问题,能不能解释得更清晰一些?多谢了!!<BR><BR>catch 
  (Foo e)<BR>...{<BR>// 继续运行这块代码?<BR>}<BR>catch (Bar e)<BR>...{<BR>// 
  还是继续运行这块代码,难以决断!<BR>}<BR>&lt;……</A>
  <LI class=listitem>thunder_silent:<A title=点击查看《回复:在ActiveX控件中引入窗体技术(转载)》 
  href="http://blog.csdn.net/sinall/archive/2005/05/23/379021.aspx#730510">太感谢搂主了!</A></LI></UL></SPAN></SPAN><BR><BR></DIV>
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<DIV style="TEXT-ALIGN: left">题目见:<BR></DIV><A 
href="http://community.csdn.net/Expert/TopicView3.asp?id=5126306">http://community.csdn.net/Expert/TopicView3.asp?id=5126306</A><BR>用C++写一个函数, 
如 Foo(const char *str), 打印出 str 的全排列, <BR>如 abc 的全排列: abc, acb, bca, dac, cab, 
cba<BR>解答:<BR>呵呵,来给大伙说说原理:<BR>A(n,n) = n!<BR>=&gt;A(n,n) = 
A(n-1,n-1)*n<BR>有了递推公式,就可以写递归函数了:<BR><BR>
<DIV 
style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 0.5pt solid; PADDING-LEFT: 5.4pt; BACKGROUND: rgb(230,230,230) 0% 50%; PADDING-BOTTOM: 4px; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 95%; PADDING-TOP: 4px; BORDER-BOTTOM: windowtext 0.5pt solid; moz-background-clip: -moz-initial; moz-background-origin: -moz-initial; moz-background-inline-policy: -moz-initial">
<DIV><IMG alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" 
align=top><SPAN style="COLOR: rgb(0,0,0)">#include&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&lt;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">vector</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&gt;</SPAN><SPAN style="COLOR: rgb(0,0,0)"><BR><IMG 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" 
align=top>#include&nbsp;</SPAN><SPAN style="COLOR: rgb(0,0,0)">&lt;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">string</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&gt;</SPAN><SPAN style="COLOR: rgb(0,0,0)"><BR><IMG 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" 
align=top>#include&nbsp;</SPAN><SPAN style="COLOR: rgb(0,0,0)">&lt;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">iostream</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&gt;</SPAN><SPAN style="COLOR: rgb(0,0,0)"><BR><IMG 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" 
align=top>#include&nbsp;</SPAN><SPAN style="COLOR: rgb(0,0,0)">&lt;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">algorithm</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&gt;</SPAN><SPAN style="COLOR: rgb(0,0,0)"><BR><IMG 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" 
align=top>#include&nbsp;</SPAN><SPAN style="COLOR: rgb(0,0,0)">&lt;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">iterator</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&gt;</SPAN><SPAN style="COLOR: rgb(0,0,0)"><BR><IMG 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" 
align=top></SPAN><SPAN style="COLOR: rgb(0,0,255)">using</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">namespace</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;std;<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" align=top><BR><IMG 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" 
align=top>typedef&nbsp;vector</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&lt;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">string</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&gt;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;Permutation;<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" 
align=top>typedef&nbsp;vector</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&lt;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">string</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&gt;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">::iterator&nbsp;PmtIterator;<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" align=top><BR><IMG 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" 
align=top></SPAN><SPAN style="COLOR: rgb(0,128,0)">//</SPAN><SPAN 
style="COLOR: rgb(0,128,0)">&nbsp;计算templet字符串中从pos位置开始的全排列</SPAN><SPAN 
style="COLOR: rgb(0,128,0)"><BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/None.gif" align=top></SPAN><SPAN 
style="COLOR: rgb(0,0,0)">Permutation&nbsp;permute(</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">const</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">string</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&amp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;templet,&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">string</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">::size_type&nbsp;pos)<BR><IMG id=_297_767_Open_Image 
onclick="this.style.display='none'; document.getElementById('_297_767_Open_Text').style.display='none'; document.getElementById('_297_767_Closed_Image').style.display='inline'; document.getElementById('_297_767_Closed_Text').style.display='inline';" 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/ExpandedBlockStart.gif" 
align=top><IMG id=_297_767_Closed_Image style="DISPLAY: none" 
onclick="this.style.display='none'; document.getElementById('_297_767_Closed_Text').style.display='none'; document.getElementById('_297_767_Open_Image').style.display='inline'; document.getElementById('_297_767_Open_Text').style.display='inline';" 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/ContractedBlock.gif" 
align=top></SPAN><SPAN id=_297_767_Closed_Text 
style="BORDER-RIGHT: rgb(128,128,128) 1px solid; BORDER-TOP: rgb(128,128,128) 1px solid; DISPLAY: none; BORDER-LEFT: rgb(128,128,128) 1px solid; BORDER-BOTTOM: rgb(128,128,128) 1px solid; BACKGROUND-COLOR: rgb(255,255,255)">...</SPAN><SPAN 
id=_297_767_Open_Text><SPAN style="COLOR: rgb(0,0,0)">{<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;Permutation&nbsp;temp;<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">if</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;(pos&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">==</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;templet.size()</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">-</SPAN><SPAN style="COLOR: rgb(0,0,0)">1</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">)<BR><IMG id=_349_408_Open_Image 
onclick="this.style.display='none'; document.getElementById('_349_408_Open_Text').style.display='none'; document.getElementById('_349_408_Closed_Image').style.display='inline'; document.getElementById('_349_408_Closed_Text').style.display='inline';" 
alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/ExpandedSubBlockStart.gif" 
align=top><IMG id=_349_408_Closed_Image style="DISPLAY: none" 
onclick="this.style.display='none'; document.getElementById('_349_408_Closed_Text').style.display='none'; document.getElementById('_349_408_Open_Image').style.display='inline'; document.getElementById('_349_408_Open_Text').style.display='inline';" 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/ContractedSubBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN id=_349_408_Closed_Text 
style="BORDER-RIGHT: rgb(128,128,128) 1px solid; BORDER-TOP: rgb(128,128,128) 1px solid; DISPLAY: none; BORDER-LEFT: rgb(128,128,128) 1px solid; BORDER-BOTTOM: rgb(128,128,128) 1px solid; BACKGROUND-COLOR: rgb(255,255,255)">...</SPAN><SPAN 
id=_349_408_Open_Text><SPAN style="COLOR: rgb(0,0,0)">{<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;temp.push_back(</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">string</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">(</SPAN><SPAN style="COLOR: rgb(0,0,0)">1</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">,&nbsp;templet[templet.size()</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">-</SPAN><SPAN style="COLOR: rgb(0,0,0)">1</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">]));<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/ExpandedSubBlockEnd.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;}</SPAN></SPAN><SPAN 
style="COLOR: rgb(0,0,0)"><BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">else</SPAN><SPAN style="COLOR: rgb(0,0,0)"><BR><IMG 
id=_417_751_Open_Image 
onclick="this.style.display='none'; document.getElementById('_417_751_Open_Text').style.display='none'; document.getElementById('_417_751_Closed_Image').style.display='inline'; document.getElementById('_417_751_Closed_Text').style.display='inline';" 
alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/ExpandedSubBlockStart.gif" 
align=top><IMG id=_417_751_Closed_Image style="DISPLAY: none" 
onclick="this.style.display='none'; document.getElementById('_417_751_Closed_Text').style.display='none'; document.getElementById('_417_751_Open_Image').style.display='inline'; document.getElementById('_417_751_Open_Text').style.display='inline';" 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/ContractedSubBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN id=_417_751_Closed_Text 
style="BORDER-RIGHT: rgb(128,128,128) 1px solid; BORDER-TOP: rgb(128,128,128) 1px solid; DISPLAY: none; BORDER-LEFT: rgb(128,128,128) 1px solid; BORDER-BOTTOM: rgb(128,128,128) 1px solid; BACKGROUND-COLOR: rgb(255,255,255)">...</SPAN><SPAN 
id=_417_751_Open_Text><SPAN style="COLOR: rgb(0,0,0)">{<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,128,0)">//</SPAN><SPAN 
style="COLOR: rgb(0,128,0)">&nbsp;计算从pos+1开始的全排列sub<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,128,0)">//</SPAN><SPAN 
style="COLOR: rgb(0,128,0)">&nbsp;然后就sub的每一项,计算出pos位置开始的全排列</SPAN><SPAN 
style="COLOR: rgb(0,128,0)"><BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/InBlock.gif" 
align=top></SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Permutation&nbsp;sub&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">=</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;permute(templet,&nbsp;pos</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">+</SPAN><SPAN style="COLOR: rgb(0,0,0)">1</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">);<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">for</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;(PmtIterator&nbsp;iter&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">=</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;sub.begin();&nbsp;iter&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">!=</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;sub.end();&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">++</SPAN><SPAN style="COLOR: rgb(0,0,0)">iter)<BR><IMG 
id=_586_748_Open_Image 
onclick="this.style.display='none'; document.getElementById('_586_748_Open_Text').style.display='none'; document.getElementById('_586_748_Closed_Image').style.display='inline'; document.getElementById('_586_748_Closed_Text').style.display='inline';" 
alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/ExpandedSubBlockStart.gif" 
align=top><IMG id=_586_748_Closed_Image style="DISPLAY: none" 
onclick="this.style.display='none'; document.getElementById('_586_748_Closed_Text').style.display='none'; document.getElementById('_586_748_Open_Image').style.display='inline'; document.getElementById('_586_748_Open_Text').style.display='inline';" 
alt="" src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/ContractedSubBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
id=_586_748_Closed_Text 
style="BORDER-RIGHT: rgb(128,128,128) 1px solid; BORDER-TOP: rgb(128,128,128) 1px solid; DISPLAY: none; BORDER-LEFT: rgb(128,128,128) 1px solid; BORDER-BOTTOM: rgb(128,128,128) 1px solid; BACKGROUND-COLOR: rgb(255,255,255)">...</SPAN><SPAN 
id=_586_748_Open_Text><SPAN style="COLOR: rgb(0,0,0)">{<BR><IMG alt="" 
src="字符串全排列(迅雷笔试题) - sinall的专栏 - CSDNBlog.files/InBlock.gif" 
align=top>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">for</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;(</SPAN><SPAN 
style="COLOR: rgb(0,0,255)">string</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">::size_type&nbsp;pos1&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">=</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">0</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">;&nbsp;pos1&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&lt;=</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">&nbsp;iter</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">-&gt;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">size();&nbsp;</SPAN><SPAN 
style="COLOR: rgb(0,0,0)">++</SPAN><SPAN style="COLOR: rgb(0,0,0)">pos1)<BR><IMG 
id=_657_744_Open_Image 
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