📄 编译预处理《实训 定义宏和使用宏定义.htm
字号:
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>30</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>quicksort(p,right);</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>31</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>}</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>32</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>}</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US> <o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>33</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>int pivot(int *left, int *right, int *pivot_pos)<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">寻找支点的函数</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>34</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>{</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>35</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>int a,b,c,*p;</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>36</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>a=*left;<SPAN style="mso-spacerun: yes"> </SPAN><SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">左端值</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>37</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>b=*(left+(right-left)/2);<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">中间值</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>38</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>c=*right;<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">右端值</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>39</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>ORDER3(a,b,c);<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">排序左、中、右三个数成增序</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt" align=left><SPAN lang=EN-US>40</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>if (a<B) SPAN <></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt" align=left><SPAN lang=EN-US>41</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>{*pivot_pos=b;<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">使</SPAN><SPAN lang=EN-US>pivot_pos</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">指向中间数</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>42</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>return YES;</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>43</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>}</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>44</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>else if (b<C) SPAN <></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt" align=left><SPAN lang=EN-US>45</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>{*pivot_pos=c;<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">若</SPAN><SPAN lang=EN-US>a,b</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">相等，但小于</SPAN><SPAN lang=EN-US>c</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，使</SPAN><SPAN lang=EN-US>pivot_pos</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">指向右数</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>46</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>return YES;</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>47</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>}</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>48</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>else<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">若</SPAN><SPAN lang=EN-US>a,b,c</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">三数相等，从左开始，找第一个不等于左端值的数</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>49</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>for(p=left+1;p<=right;p++)<SPAN style="mso-spacerun: yes"> </SPAN></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>50</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>if(*p!=*left)</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>51</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>{</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt" align=left><SPAN lang=EN-US>52</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>*pivot_pos=(*p<*left)?*left:*p;</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>53</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>return YES;</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>54</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>}</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>55</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>return NO;<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">全部数据都相等，返回</SPAN><SPAN lang=EN-US>NO</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，结束排序</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt" align=left><SPAN lang=EN-US>56</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>}</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt" align=left><SPAN lang=EN-US> <o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>57</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>int *partition(int *left, int *right, int pivot)<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">根据支点分割函数</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>58</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>{</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>59</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>while(left<=right)</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>60</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>{</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt" align=left><SPAN lang=EN-US>61</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>while(*left<PIVOT)<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">从左找大于或等于支点的数</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt" align=left><SPAN lang=EN-US>62</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>left++;</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>63</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>while(*right>=pivot)<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">从右找小于支点的数</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>64</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>right--;</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>65</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>if(left<RIGHT)<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">左边的大于或等于支点的和右边小于支点的数据互换</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>66</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>{</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt; mso-char-indent-count: 2.0; mso-char-indent-size: 10.5pt" align=left><SPAN lang=EN-US>67</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>SWAP(*left,*right);</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>68</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>left++;</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>69</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>right--;</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>70</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US><SPAN style="mso-spacerun: yes"> </SPAN>}</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>71</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US> }</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>72</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>return left;<SPAN style="mso-spacerun: yes"> </SPAN>/*</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">返回右端部分的左端指针</SPAN><SPAN lang=EN-US>*/</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>73</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</SPAN><SPAN lang=EN-US>}</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">运行情况如下：</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>Enter Data:8<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>2<SPAN style="mso-tab-count: 1"> </SPAN>7<SPAN style="mso-tab-count: 1"> </SPAN>6<SPAN style="mso-tab-count: 1"> </SPAN>8<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>-1<SPAN style="mso-tab-count: 1"> </SPAN>9<SPAN style="mso-tab-count: 1"> </SPAN>-5</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>The original numbers are: 8<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>2<SPAN style="mso-tab-count: 1"> </SPAN>7<SPAN style="mso-tab-count: 1"> </SPAN>6<SPAN style="mso-tab-count: 1"> </SPAN>8<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>-1<SPAN style="mso-tab-count: 1"> </SPAN>9<SPAN style="mso-tab-count: 1"> </SPAN>-5</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>The sorted numbers are:-5<SPAN style="mso-tab-count: 1"> </SPAN>-1<SPAN style="mso-tab-count: 1"> </SPAN>2<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>6<SPAN style="mso-tab-count: 1"> </SPAN>7<SPAN style="mso-tab-count: 1"> </SPAN>8<SPAN style="mso-tab-count: 1"> </SPAN>8<SPAN style="mso-tab-count: 1"> </SPAN>9</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">分析：程序中</SPAN><SPAN lang=EN-US>1~6</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行是宏定义，</SPAN><SPAN lang=EN-US>7~23</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行是主函数，在主函数中先对用到的自定义函数进行声明，然后是输入待排序数据和输出未经排序的原始数据。第</SPAN><SPAN lang=EN-US>19</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行是调用快速排序函数</SPAN><SPAN lang=EN-US>quicksort</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">对数组</SPAN><SPAN lang=EN-US>a</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">进行排序。</SPAN><SPAN lang=EN-US>20~22</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行输出经排序后的数据。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>24~32</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行是快速排序函数，快速排序的基本思想是，先选择一个数做为支点（比较数），以后各元素逐个与支点比较相对大小关系，把小于支点的元素放在一边，大于或等于支点的元素放在一边。这样通过一趟排序将待排数据分割成独立的两部分，然后对分开的两部分重复这一划分过程，直到所有部分都不能再进行划分为止，这是一个递归函数。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>33~55</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行是选支点的函数，并放入</SPAN><SPAN lang=EN-US>piovt_pos</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">所指的存储区中。理想地说，支点应被选择的使每一次递归调用后，数组分成的两部分有相同或近似相同的元素个数。这样，可以降低调用</SPAN><SPAN lang=EN-US>quicksort()</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函数的次数，从而提高运行效率。但我们无法预知这样的元素应该是哪一个，所以我们试图从左端值、中间值和右端值中取一个元素为支点。在对</SPAN><SPAN lang=EN-US>a</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN lang=EN-US>b</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、</SPAN><SPAN lang=EN-US>c</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">三元素排序后，若</SPAN><SPAN lang=EN-US>a<B< SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，自然选</SPAN><SPAN lang=EN-US>b</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作支点，并返回</SPAN><SPAN lang=EN-US>YES</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；否则，若</SPAN><SPAN lang=EN-US>a=b</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，且</SPAN><SPAN lang=EN-US>b<C< SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，选</SPAN><SPAN lang=EN-US>c</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">作支点，并返回</SPAN><SPAN lang=EN-US>YES</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">；否则，</SPAN><SPAN lang=EN-US>a</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</SPAN><SPAN lang=EN-US>b</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</SPAN><SPAN lang=EN-US>c</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">三数都相等，则从待排序列的第二个数开始找第一个不等于左端值的数，若找到，返回</SPAN><SPAN lang=EN-US>YES</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，若找不到，证明待排序列元素都相等，返回</SPAN><SPAN lang=EN-US>NO</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，结束本次排序过程。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN lang=EN-US>57~73</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">行是将待排序列所有数据与支点比较，当从左开始找到的大于或等于支点的数与从右找到的小于支点的数，在满足条件</SPAN><SPAN lang=EN-US>left<RIGHT< SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时进行交换。重复上述过程，直到</SPAN><SPAN lang=EN-US>left>right</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为止，从而使支点左边的数都小于支点，而支点右边的数都大于或等于指点。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">下面分析一次</SPAN><SPAN lang=EN-US>quicksort()</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函数执行的情况：利用上述输入的</SPAN><SPAN lang=EN-US>10</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个数据，当函数</SPAN><SPAN lang=EN-US>pivot()</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">被调用时，</SPAN><SPAN lang=EN-US>a=8,b=6,c=-5</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，排序后</SPAN><SPAN lang=EN-US>a=-5,b=6,c=8</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，</SPAN><SPAN lang=EN-US>a<B< SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">成立，取支点为</SPAN><SPAN lang=EN-US>6</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，并返回</SPAN><SPAN lang=EN-US>TRUE</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。然后调用</SPAN><SPAN lang=EN-US>partition()</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函数，将待排序列分割成两部分，下面的表显示了</SPAN><SPAN lang=EN-US>partition()</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">函数的每一次外部循环后，数组元素值（括号中的元素是被交换的元素）的情况，最后，当</SPAN><SPAN lang=EN-US>left>right</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">时退出循环。</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">原数据：</SPAN><SPAN lang=EN-US>8<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>2<SPAN style="mso-tab-count: 1"> </SPAN>7<SPAN style="mso-tab-count: 1"> </SPAN>6<SPAN style="mso-tab-count: 1"> </SPAN>8<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>-1<SPAN style="mso-tab-count: 1"> </SPAN>9<SPAN style="mso-tab-count: 1"> </SPAN>-5</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第一遍：</SPAN><SPAN lang=EN-US>(-5) 3<SPAN style="mso-tab-count: 1"> </SPAN>2<SPAN style="mso-tab-count: 1"> </SPAN>7<SPAN style="mso-tab-count: 1"> </SPAN>6<SPAN style="mso-tab-count: 1"> </SPAN>8<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>-1<SPAN style="mso-tab-count: 1"> </SPAN>9<SPAN style="mso-spacerun: yes"> </SPAN>(8)</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第二遍：</SPAN><SPAN lang=EN-US>-5<SPAN style="mso-spacerun: yes"> </SPAN>3 <SPAN style="mso-tab-count: 1"> </SPAN>2<SPAN style="mso-tab-count: 1"> </SPAN>(-1)<SPAN style="mso-tab-count: 1"> </SPAN>6<SPAN style="mso-tab-count: 1"> </SPAN>8<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>(7)<SPAN style="mso-tab-count: 1"> </SPAN>9<SPAN style="mso-tab-count: 1"> </SPAN>8</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">第三遍：</SPAN><SPAN lang=EN-US>-5<SPAN style="mso-tab-count: 1"> </SPAN>3<SPAN style="mso-tab-count: 1"> </SPAN>2<SPAN style="mso-spacerun: yes"> </SPAN>-1 <SPAN style="mso-tab-count: 1"> </SPAN>(3)<SPAN style="mso-tab-count: 1"> </SPAN>8<SPAN style="mso-tab-count: 1"> </SPAN>(6)<SPAN style="mso-tab-count: 1"> </SPAN>7<SPAN style="mso-tab-count: 1"> </SPAN>9<SPAN style="mso-tab-count: 1"> </SPAN>8</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 21pt" align=left><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">经过一趟分割后，数组中下标为</SPAN><SPAN lang=EN-US>0</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">到</SPAN><SPAN lang=EN-US>4</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN lang=EN-US>5</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个元素的值已经比支点小了，而下标为</SPAN><SPAN lang=EN-US>5</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">到</SPAN><SPAN lang=EN-US>9</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的</SPAN><SPAN lang=EN-US>5</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个元素的值比支点大或相等，元素</SPAN><SPAN lang=EN-US>a[5]</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的地址作为函数的返回值返回。然后由递归函数分别对左、右部分重复上述过程。</SPAN></P>
⌨️ 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 + -