slide0036.htm
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<title>第三章</title>
<meta name=Description content=2008-3-24>
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<div style='mso-line-spacing:"115 20 0";position:absolute;top:10.5%;
left:8.42%;width:89.88%;height:6.0%'><span style='mso-special-format:nobullet;
display:none'>•</span><span lang=EN-US style='font-size:88%;color:#FF3300;
mso-fareast-language:ZH-CN'><b>3. </b></span><span style='font-family:宋体;
mso-fareast-font-family:宋体;font-size:88%;color:#FF3300'><b>字符串操作函数</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:88%;display:none'><b> </b></span></div>
<div style='mso-line-spacing:"115 20 0";position:absolute;top:19.0%;
left:8.42%;width:89.88%;height:6.0%'><span style='mso-special-format:nobullet;
display:none'>•</span><span style='font-size:88%'><b><span
style='mso-spacerun:yes'> </span></b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>常用的字符串函数见</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>p64</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>表</b></span><span
style='font-size:75%'><b> </b></span></div>
<div style='mso-line-spacing:"115 20 0";position:absolute;top:27.75%;
left:8.42%;width:89.88%;height:5.5%'><span style='mso-special-format:nobullet;
display:none'>•</span><span style='font-family:宋体;mso-fareast-font-family:
宋体;font-size:88%'><b>说明: </b></span></div>
<div style='mso-line-spacing:"115 20 0"'><span style='position:absolute;
top:35.25%;left:8.42%;width:107.67%;height:5.25%'><span style='mso-special-format:
nobullet;display:none'>•</span><span style='font-size:75%'><b><span
style='mso-spacerun:yes'>
</span></b></span><span style='font-family:宋体;mso-fareast-font-family:宋体;
font-size:75%'><b>如果返回是字符型,则函数后有</b></span><span style='font-size:75%'><b>“</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>$</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>”</b></span><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>字符。当然一般也可</b></span></span><span
style='position:absolute;top:42.0%;left:12.17%;width:86.14%;height:4.75%'><span
style='font-family:宋体;mso-fareast-font-family:宋体;font-size:75%'><b>以不写,习惯都写上。 </b></span></span></div>
<div style='mso-line-spacing:"115 0 0";position:absolute;top:48.25%;
left:8.42%;width:89.88%;height:4.75%'><span style='mso-special-format:nobullet;
display:none'>•</span><span style='font-family:宋体;mso-fareast-font-family:
宋体;font-size:75%'><b>例如: </b></span></div>
<div style='mso-line-spacing:"115 0 0";position:absolute;top:53.75%;
left:8.42%;width:89.88%;height:5.25%'><span style='mso-special-format:nobullet;
display:none'>•</span><span style='font-size:75%'><b><span
style='mso-spacerun:yes'> </span>len("This is a
book!")<span
style='mso-spacerun:yes'>
</span>15 </b></span></div>
<div style='mso-line-spacing:"115 0 0";position:absolute;top:60.0%;left:8.42%;
width:89.88%;height:5.25%'><span style='mso-special-format:nobullet;
display:none'>•</span><span lang=EN-US style='font-size:75%;mso-fareast-language:
ZH-CN'><b><span style='mso-spacerun:yes'>
</span>Left$("ABCDEFG",3)<span
style='mso-spacerun:yes'>
</span>"ABC"<span
style='mso-spacerun:yes'>
</span> </b></span></div>
<div style='mso-line-spacing:"115 0 0";position:absolute;top:66.0%;left:8.42%;
width:89.88%;height:5.25%'><span style='mso-special-format:nobullet;
display:none'>•</span><span lang=EN-US style='font-size:75%;mso-fareast-language:
ZH-CN'><b><span style='mso-spacerun:yes'>
</span>Mid$("ABCDEFG",2,3)<span
style='mso-spacerun:yes'>
</span>"BCD" </b></span></div>
<div style='mso-line-spacing:"115 0 0"'><span style='position:absolute;
top:72.25%;left:8.42%;width:103.37%;height:5.25%'><span style='mso-special-format:
nobullet;display:none'>•</span><span lang=EN-US style='font-size:75%;
mso-fareast-language:ZH-CN'><b><span style='mso-spacerun:yes'>
</span>InStr(2, </b></span><span lang=EN-US style='font-size:75%;mso-fareast-language:
ZH-CN'><b>“</b></span><span lang=EN-US style='font-size:75%;mso-fareast-language:
ZH-CN'><b>ABCDEFGEF</b></span><span lang=EN-US style='font-size:75%;
mso-fareast-language:ZH-CN'><b>”</b></span><span lang=EN-US style='font-size:
75%;mso-fareast-language:ZH-CN'><b>, </b></span><span lang=EN-US
style='font-size:75%;mso-fareast-language:ZH-CN'><b>“</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>EF</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>”</b></span><span
lang=EN-US style='font-size:75%;mso-fareast-language:ZH-CN'><b>)<span
style='mso-tab-count:1;width:1.15%'> </span><span
style='mso-spacerun:yes'>
</span>5</b></span><span style='font-family:宋体;mso-fareast-font-family:宋体;
font-size:75%'><b>(第一次出现的位</b></span></span><span style='position:absolute;
top:78.75%;left:12.17%;width:86.14%;height:4.75%'><span style='font-family:
宋体;mso-fareast-font-family:宋体;font-size:75%'><b>置)</b></span></span></div>
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