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📄 磁动力工作室--51单片机c语言入门教程--第四课:数据类型.htm

📁 用C语言编写的一些源码示例
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                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">0~4294967295<O:P></O:P></SPAN></P></TD></TR>
                                <TR>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 142.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=189>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">signed 
                                long<O:P></O:P></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 97.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=130>
                                <P class=MsoNormal><SPAN 
                                style="FONT-FAMILY: 宋体">四字节<SPAN 
                                lang=EN-US><O:P></O:P></SPAN></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 187pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=249>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">-2147483648~+2147483647<O:P></O:P></SPAN></P></TD></TR>
                                <TR>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 142.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=189>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">float<O:P></O:P></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 97.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=130>
                                <P class=MsoNormal><SPAN 
                                style="FONT-FAMILY: 宋体">四字节<SPAN 
                                lang=EN-US><O:P></O:P></SPAN></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 187pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=249>
                                <P class=MsoNormal><SPAN 
                                style="FONT-FAMILY: 宋体">±<SPAN 
                                lang=EN-US>1.175494E-38~±3.402823E+38<O:P></O:P></SPAN></SPAN></P></TD></TR>
                                <TR>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 142.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=189>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">*<O:P></O:P></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 97.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=130>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">1~3字节<O:P></O:P></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 187pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=249>
                                <P class=MsoNormal><SPAN 
                                style="FONT-FAMILY: 宋体">对象的地址<SPAN 
                                lang=EN-US><O:P></O:P></SPAN></SPAN></P></TD></TR>
                                <TR>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 142.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=189>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">bit<O:P></O:P></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 97.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=130>
                                <P class=MsoNormal><SPAN 
                                style="FONT-FAMILY: 宋体">位<SPAN 
                                lang=EN-US><O:P></O:P></SPAN></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 187pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=249>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">0或1<O:P></O:P></SPAN></P></TD></TR>
                                <TR>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 142.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=189>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">sfr<O:P></O:P></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 97.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=130>
                                <P class=MsoNormal><SPAN 
                                style="FONT-FAMILY: 宋体">单字节<SPAN 
                                lang=EN-US><O:P></O:P></SPAN></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 187pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=249>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">0~255<O:P></O:P></SPAN></P></TD></TR>
                                <TR>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 142.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=189>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">sfr16<O:P></O:P></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 97.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=130>
                                <P class=MsoNormal><SPAN 
                                style="FONT-FAMILY: 宋体">双字节<SPAN 
                                lang=EN-US><O:P></O:P></SPAN></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 187pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=249>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">0~65535<O:P></O:P></SPAN></P></TD></TR>
                                <TR>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 0.5pt solid; WIDTH: 142.1pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=189>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">sbit<O:P></O:P></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 97.3pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=130>
                                <P class=MsoNormal><SPAN 
                                style="FONT-FAMILY: 宋体">位<SPAN 
                                lang=EN-US><O:P></O:P></SPAN></SPAN></P></TD>
                                <TD 
                                style="BORDER-RIGHT: windowtext 0.5pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: medium none; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: medium none; WIDTH: 187pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 0.5pt solid; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" 
                                vAlign=top width=249>
                                <P class=MsoNormal><SPAN lang=EN-US 
                                style="FONT-FAMILY: 宋体">0或1<O:P></O:P></SPAN></P></TD></TR></TBODY></TABLE>
                              <P class=MsoNormal style="TEXT-ALIGN: center" 
                              align=center><SPAN style="FONT-FAMILY: 宋体">表<SPAN 
                              lang=EN-US>4-1 KEIL uVision2 
                              C51编译器所支持的数据类型<O:P><BR></O:P></SPAN></SPAN></P></TD></TR>
                          <TR>
                            <TD><BR>1. 
                              char字符类型<BR>char类型的长度是一个字节,通常用于定义处理字符数据的变量或常量。分无符号字符类型unsigned 
                              char和有符号字符类型signed char,默认值为signed char类型。unsigned 

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