c++ builder 初学问与答（十六）.htm

我收集的一些C++BUILDER编程用的知识,适合于初学者使用

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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>LowerCase</SPAN></P></TD>
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                  <P class=MsoNormalIndent 
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                  lang=EN-US>AnsiString _fastcall LowerCase() 
const</SPAN></P></TD>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">将字符串中的大写字母改写成小写</SPAN></P></TD></TR>
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                <TD 
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>UpperCase</SPAN></P></TD>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>AnsiString _fastcall UpperCase() 
const</SPAN></P></TD>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">将字符串中的小写字母改写成大写</SPAN></P></TD></TR>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>Pos</SPAN></P></TD>
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                  <P class=MsoNormalIndent 
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                  lang=EN-US>int _fastcall Pos(cont AnsiString&amp; 
                  substr)const;</SPAN></P></TD>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">找出子字符串在原字符串中由第几个位置开始</SPAN></P></TD></TR>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>SubString</SPAN></P></TD>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>AnsiString _fastcall SubString(int index,int 
                  count)const</SPAN></P></TD>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">返回由</SPAN><SPAN 
                  lang=EN-US>index</SPAN><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">处向后取</SPAN><SPAN 
                  lang=EN-US>count</SPAN><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">个字符</SPAN></P></TD></TR>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>ToDouble</SPAN></P></TD>
                <TD 
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>double _fastcall ToDouble() const</SPAN></P></TD>
                <TD 
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">将字符转成双精度数值</SPAN></P></TD></TR>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>ToInt</SPAN></P></TD>
                <TD 
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>int _fastcall ToInt() const</SPAN></P></TD>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">将字符转成整形</SPAN></P></TD></TR>
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>IntToStr</SPAN></P></TD>
                <TD 
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>AnsiString _fastcall IntToStr(int 
                Value)</SPAN></P></TD>
                <TD 
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                vAlign=top width=182>
                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">将整形转成字符串</SPAN></P></TD></TR>
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                <TD 
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>Trim</SPAN></P></TD>
                <TD 
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                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  lang=EN-US>AnstString _fastcall Trim() const</SPAN></P></TD>
                <TD 
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                vAlign=top width=182>
                  <P class=MsoNormalIndent 
                  style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm"><SPAN 
                  style="FONT-FAMILY: 宋体; mso-ascii-font-family: ''''Times New Roman''''; mso-hansi-font-family: ''''Times New Roman''''">返回一个新的字符串，
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                  <DIV id=lcmfrvndbin>h