⭐ 欢迎来到虫虫下载站! | 📦 资源下载 📁 资源专辑 ℹ️ 关于我们
⭐ 虫虫下载站

📄 text7-2.htm

📁 浙江大学计算机学院数据结构课程的教学课件
💻 HTM
字号:
<html>
<head>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>

<body bgcolor="#FFFFFF" link="#0000FF" vlink="#3399FF" alink="#FF0066">
<div id="Layer1" style="position:absolute; width:711px; height:21px; z-index:1; top: 10px; background-color: #CCCCCC; layer-background-color: #CCCCCC; border: 1px none #000000; left: 26px"><b>|</b><font face="宋体" size="2"><a href="../text1/text1-0.htm">第一章</a></font><b>|</b><font face="宋体" size="2"><a href="../text2/text2-0.htm">第二章</a></font><b>|</b><font face="宋体" size="2"><a href="../text3/text3-0.htm">第三章</a></font><b>|</b><font face="宋体" size="2"><a href="../text4/text4-0.htm">第四章</a></font><b>|</b><font face="宋体" size="2"><a href="../text5/text5-0.htm">第五章</a></font><b>|</b><font face="宋体" size="2"><a href="../text6/text6-0.htm">第六章</a></font><b>|</b><font face="宋体" size="2">第七章</font><b>|</b><font face="宋体" size="2"><a href="../text8/text8-0.htm">第八章</a></font><b>|</b><font face="宋体" size="2"><a href="../text9/text9-0.htm">第九章</a></font><b>|</b><font face="宋体" size="2"><a href="../text10/text10-0.htm">第十章</a></font><b>|</b><font size="2" face="宋体"><a href="../textA/textA-0.htm">算法分析</a><b><font color="#000000">|</font></b> 
  </font></div>
<pre align="left">

<b><font face="Arial, Helvetica, sans-serif" size="4" color="#000000">(2) <font color="#FF0000">Binary search</font>
<font color="#0033CC">assume: </font>  the list is ordered on the key field 
<font color="#0033CC">program  </font>    <font color="#FF0000">  O( logn )
</font>
int <font color="#FF0000">binsearch</font>(element list [ ], int searchnum, int n)
{<i><font size="3" color="#CC0099">/* search list[0],....,list[n-1] */</font></i>
        int left = 0,right = n-1, middle;
        while (left <= right){
                middle = (left + right)/2;
                switch(COMPARE(list[middle].key, searchnum)){
                     case -1:left = middle+1;
                             break;
                     case 0: return middle;
                     case 1: right = middle-1;
               }
        }
        return -1;
}
                       <img src="image/binarysea1.gif" width="476" height="90"> </font></b></pre>
<table width="725" cellspacing="0" height="53">
  <tr>
    <td width="387"><b><font face="Arial, Helvetica, sans-serif" size="4" color="#000000"><font color="#FF0000">decision 
      tree for binary search</font></font></b></td>
    <td width="332">&nbsp;</td>
  </tr>
  <tr>
    <td width="387">
      <pre><font face="Arial, Helvetica, sans-serif" size="4" color="#000000"><b><font color="#FF0000">
(4,15,17,26,30,<font color="#000000">46</font>,48,56,58,82,90,95)</font></b></font></pre>
      <pre><b><font face="Arial, Helvetica, sans-serif" size="4" color="#FF0000">           <font color="#000000">^                               ^</font>         </font></b></pre>
      <pre><b><font face="Arial, Helvetica, sans-serif" size="4" color="#FF0000">          </font></b></pre>
    </td>
    <td width="332"><img src="image/text7-a.gif" width="281" height="137"></td>
  </tr>
</table>
<pre align="left">&nbsp;                                

</pre>
<table width="731" cellspacing="0" cellpadding="0">
  <tr> 
    <td width="327">&nbsp;</td>
    <td width="271"><a href="../index.htm"><img width="60" height="25" usemap="#MapMap4" border="0" src="../../images/home.gif"></a><a href="../index.htm"><map name="MapMap4"><area shape="rect" coords="42,-34,88,-15" href="text0.htm"><area shape="rect" coords="4,4,55,23" href="text7-index.htm"></map></a></td>
    <td width="131"><font face="楷体_GB2312" size="2"><b><a href="text7-1.htm">上一页</a> 
      <a href="text7-3.htm">下一页</a> </b></font></td>
  </tr>
</table>
</body>
</html>

⌨️ 快捷键说明

复制代码 Ctrl + C
搜索代码 Ctrl + F
全屏模式 F11
切换主题 Ctrl + Shift + D
显示快捷键 ?
增大字号 Ctrl + =
减小字号 Ctrl + -