slide0103.htm
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<title>第四章</title>
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<div v:shape="_x0000_s191490" class=O style='mso-line-spacing:"120 0 0"'><span
style='position:absolute;top:5.5%;left:9.36%;width:106.74%;height:5.25%'><span
style='font-family:宋体;mso-fareast-font-family:宋体;color:#0033CC'><b>验证哥德巴赫猜想</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;color:black'><b>:一个大于等于</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";color:black;mso-fareast-language:
ZH-CN'><b>6</b></span><span style='font-family:宋体;mso-fareast-font-family:
宋体;color:black'><b>的偶数可以表示为两个素</b></span></span><span style='position:absolute;
top:12.0%;left:9.36%;width:89.88%;height:5.25%'><span style='font-family:宋体;
mso-fareast-font-family:宋体;color:black'><b>数之和。例如:</b></span><span
style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";color:black'><b><span
style='mso-spacerun:yes'> </span>6=3+3<span
style='mso-spacerun:yes'> </span>8=3+5<span
style='mso-spacerun:yes'> </span>10= 3+7</b></span></span></div>
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<div style='text-align:justify;mso-line-spacing:"120 50 0";position:absolute;
top:24.0%;left:7.67%;width:51.49%;height:56.25%'><b><span
style='mso-spacerun:yes'> </span></b><span
style='font-family:宋体;mso-fareast-font-family:宋体;color:red'><b>算法设计:</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>设</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>为大于等于</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>6</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>的任一偶数,将其分解为</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N1</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>和</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N2</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>两个数,使用</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N1+N2=N</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>,分别判断</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N1</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>和</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N2</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>是否为素数,若都是,则为一组解。若</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N1</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>不是素数,就不必再检查</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N2</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>是否素数。先从</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N1=3</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>开始,直到</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>N1=N/2</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>为止。算法流程图如图</b></span><span
lang=EN-US style='font-family:"Times New Roman";mso-ascii-font-family:"Times New Roman";
mso-fareast-font-family:"Arial Unicode MS";mso-fareast-language:ZH-CN'><b>4-29</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体'><b>所示。将程序代码写到窗体的单击事件中。</b></span><span
style='font-family:"Arial Unicode MS";mso-fareast-font-family:"Arial Unicode MS";
display:none'><b> </b></span></div>
<div style='mso-line-spacing:"120 50 0";position:absolute;top:84.75%;
left:7.67%;width:51.49%;height:4.75%'><span style='font-family:宋体;mso-fareast-font-family:
宋体;mso-special-format:lastCR;display:none'><b> </b></span></div>
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style='font-family:宋体;mso-fareast-font-family:宋体'><b>实现上面算法的程序代码如下:</b></span></div>
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