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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 106 行
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<b>|</b><font face="宋体" size="2">第一章</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"><a href="../text7/text7-0.htm">第七章</a></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>
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<pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>
<font size="5" color="#ff0033">(1) space complexity</font>
<font color="#0000FF">Fixed space requirements</font> (C):
instruction space (store the code)
simple variables
fixed_size structured variables
constants
<font color="#0000FF">Variable space requirements</font>:
<font color="#ff0033"><i>Sp( I )</i></font> , the space needed by structured variables whose size de-
pends on the particular instance, I , of the problem being
solved. ( +recursive space)
<font color="#ff0033"><i> I</i></font> ---- number、size、value of the input and output.
<font color="#0000FF"><i> S(P) = C + Sp( I )</i></font>
float <font color="#FF0033">abc </font>(float a, float b, float c)
{
return (a+b+b*c+(a+b-c)/(a+b)+4.00) <font color="#ff0033"><i> S<font size="3">abc</font>( I )=0</i></font>
}
float <font color="#FF0033">sum</font>(float list[ ] , int n)
{
float tempsum=0; <i><font size="5" color="#ff0033">s</font><font color="#ff0033" size="3">sum</font><font color="#ff0033">( I )= <font size="5">s</font><font size="3">sum</font>( n )=n</font></i> <i>(psacal)</i>
int i; <i><font size="5"><font color="#ff0033">s</font></font><font color="#ff0033" size="3">sum</font><font color="#ff0033">( n )=0</font></i> <i> (c)</i>
for ( i=0; i < n; i++) (C does not copy the array)
tempsum += list[ i ];
return tempsum;
}
float<font color="#ff0033"> rsum</font>(float list[ ], int m)
{
if (n) return<font color="#ff0033"> rsum</font>( list, n-1) + list[ n-1 ];
returm 0;
}
<font size="5"><i><font color="#ff0033"> s</font></i></font><font color="#ff0033"><i><font size="3">rsum( MAX_SIZE )</font> = 6 * MAX_SIZE (n=MAX_SIZE )</i></font>
</b></font></pre>
<table width="725" border="1" height="163">
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<td width="311">
<div align="center"><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>
Type</b></font></div>
</td>
<td width="124">
<div align="center"><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>Name</b></font></div>
</td>
<td width="268">
<div align="center"><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>
Number of bytes</b></font></div>
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<pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>parameter: float
parameter: integer
return address:(used internally) </b></font></pre>
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<td width="124">
<pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>list [ ]
n
</b></font><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b> </b></font></pre>
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<pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>2
2
2<font size="2"> (unless a far address)</font> </b></font></pre>
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<td width="311" height="35"><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>TOTAL<i><font size="3">
per recursive call</font></i></b></font></td>
<td width="124" height="35"> </td>
<td width="268" height="35">
<pre><font face="Arial, Helvetica, sans-serif" color="#000000" size="4"><b>6 <font size="2"> </font> </b></font></pre>
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