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📄 c语言基础(07-c语言中的关键字).htm

📁 语言基础(初学都必修)包括数据类型、运算符与表达式,运算符和表达式,逻辑运算符和逻辑表达式,C语言中的关键字,定义宏和使用宏定义,数据类型转换
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      <P align=center>C语言基础(07-C语言中的关键字)　</P></td>
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      <P align=center>作者：dd&nbsp;&nbsp;&nbsp;&nbsp;教程来源：C语言之家&nbsp;&nbsp;&nbsp;&nbsp;点击数：112&nbsp;&nbsp;&nbsp;&nbsp;更新时间：2006-6-6 <A title=收藏的网页将被永久地保存到新浪ViVi收藏夹http://vivi.sina.com.cn href="javascript:d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(vivi=window.open('http://vivi.sina.com.cn/collect/icollect.php?pid=2008&title='+escape(d.title)+'&url='+escape(d.location.href)+'&desc='+escape(t),'vivi','scrollbars=no,width=480,height=480,left=75,top=20,status=no,resizable=yes'));vivi.focus();"><IMG src="/images/vivi_coop1.gif" align=absMiddle border=0></A>　</P></td>
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				<p align="left"><P class=MsoNormal><SPAN lang=EN-US style="COLOR: blue">C</SPAN><SPAN style="COLOR: blue; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">语言中的关键字</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">――什么是“关键字”，就是在</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'">语中已经使用了的有特殊含意的字符，在定义变量的时候不要</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">使用这些“关键字”，否则在编译时会产生许多莫明其妙的错误。</SPAN></P>
<P class=MsoNormal><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">关键字共有</SPAN><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'">个：（</SPAN><SPAN lang=EN-US>P375</SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">）</SPAN></P>
<TABLE style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BACKGROUND: #00cc99; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-alt: solid #3366FF .25pt; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt" cellSpacing=0 cellPadding=0 bgColor=#00cc99 border=1>
<TBODY>
<TR>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #3366ff 0.25pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #3366ff 0.25pt solid; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid" width=114>
<P class=MsoNormal><SPAN lang=EN-US>auto</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #3366ff 0.25pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>break</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #3366ff 0.25pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>case</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #3366ff 0.25pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>char</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #3366ff 0.25pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>const</SPAN></P></TD></TR>
<TR>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #3366ff 0.25pt solid; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>continue</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>default</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>do</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>double</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>else</SPAN></P></TD></TR>
<TR>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #3366ff 0.25pt solid; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>enum</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>extern</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>float</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>for</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>goto</SPAN></P></TD></TR>
<TR>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #3366ff 0.25pt solid; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>if</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>int</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.2pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>long</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>register</SPAN></P></TD>
<TD style="BORDER-RIGHT: #3366ff 0.25pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 85.25pt; PADDING-TOP: 0cm; BORDER-BOTTOM: #3366ff 0.25pt solid; mso-border-left-alt: solid #3366FF .25pt; mso-border-top-alt: solid #3366FF .25pt" width=114>
<P class=MsoNormal><SPAN lang=EN-US>return</SPAN></P></TD></TR>
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