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来自「浙江大学计算机学院数据结构课程的教学课件」· HTM 代码 · 共 76 行

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<pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b><font size="5" color="#FF0033">&#149;</font> <font color="#3333FF">Recursive summing of a list of numbers</font>
       float<font color="#FF0033"> rsum</font>(float list[ ], int m)
          {
              count ++;                      <font color="#FF0099"> <i> /*for if conditional*/</i></font>
              if (n)  {
                      count++;               <font color="#FF0099"><i> /* for return and rsum invocation */</i></font>
                      return <font color="#FF0033">rsum</font>( list, n-1) + list[ n-1 ];
               }
              count++;
              returm list [ 0 ];
          }  

<font color="#FF0033" size="5">count = 2n + 2</font>
</b></font></pre>
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      <pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b><font color="#0033CC">             Statement</font></b></font></pre>
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      <pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>   <font color="#0000FF">s / e     Frequency      Total steps</font></b></font></pre>
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      <pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b> float rsum(float list[ ], int m)</b></font><br><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>        {<br></b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>         </b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b> if (n)</b></font><br><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>  </b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>        return rsum( list, n-1) <br>                                + list[ n-1 ];<br></b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>         </b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>return list [ 0 ];<br></b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>       }	</b></font></pre>
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      <pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>  0               0                        0 <br></b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>  0               0                        0 <br></b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>  1              n+1                 </b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b> n+1<br></b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>  1               n                        n<br></b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>  1               1                        1<br></b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>  0               0                        0 <br></b></font></pre>
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      <pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>                                           Total	</b></font></pre>
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      <pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="3"><b>  <font color="#FF0033">2n+2</font></b></font></pre>
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