📄 第五章 keil c51库函数参考.htm
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<H3 style="MARGIN-LEFT: 0cm; TEXT-INDENT: 0cm"><A
name=_Toc475103208><SPAN lang=EN-US style="FONT-SIZE: 15pt">2.
</SPAN><SPAN lang=EN-US>INTRINS.H</SPAN></A><SPAN
style="mso-bookmark: _Toc475103208"></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt"><O:P></O:P></SPAN></H3>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">unsigned char
_crol_(unsigned char c,unsigned char b)；</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">unsigned char
_cror_(unsigned char c,unsigned char b)；</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">unsigned char
_chkfloat_(float ual)；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">unsigned int
_irol_(unsigned int i,unsigned char b)；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 45.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">unsigned int
_iror_(unsigned int i,unsigned char b)；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 45.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">unsigned long
_irol_(unsigned long l,unsigned char b)；</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 45.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">unsigned long
_iror_(unsigned long L,unsigned char b)；</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">void
_nop_(void)；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">bit _testbit_(bit
b)；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<H3 style="MARGIN-LEFT: 0cm; TEXT-INDENT: 0cm"><A
name=_Toc475103209><SPAN lang=EN-US style="FONT-SIZE: 15pt">3.
</SPAN><SPAN lang=EN-US>STDIO.H</SPAN></A><SPAN
style="mso-bookmark: _Toc475103209"></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt"><O:P></O:P></SPAN></H3>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-spacerun: yes"> </SPAN>char
getchar(void)；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-spacerun: yes"> </SPAN>char
_getkey(void)；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">char *gets(char *
string,int len)；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">int printf(const char
* fmtstr[,argument]…);<O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-tab-count: 1"> </SPAN>char
putchar(char c);<O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-tab-count: 1"> </SPAN>int puts
(const char * string);<O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-tab-count: 1"> </SPAN>int
scanf(const char * fmtstr.[,argument]…)；</SPAN><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 45.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">int sprintf(char *
buffer,const char *fmtstr[;argument])；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 45.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><SPAN
style="mso-tab-count: 1">
</SPAN></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体">int sscanf(char
*buffer,const char * fmtstr[,argument]);<O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-tab-count: 1"> </SPAN>char
ungetchar(char c);<O:P></O:P></SPAN></P>
<P class=MsoNormal
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align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-tab-count: 1"> </SPAN>void
vprintf (const char *fmtstr,char *
argptr);<O:P></O:P></SPAN></P>
<P class=MsoNormal
style="TEXT-INDENT: 24pt; TEXT-ALIGN: left; tab-stops: 45.0pt 117.0pt"
align=left><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体"><SPAN
style="mso-tab-count: 1"> </SPAN>void
vsprintf(char *buffer,const char * fmtstr,char *
argptr)；</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'"><O:P></O:P></SPAN></P>
<H3 style="MARGIN-LEFT: 0cm; TEXT-INDENT: 0cm"><A
name=_Toc475103210><SPAN lang=EN-US style="FONT-SIZE: 15pt">4.
</SPAN><SPAN lang=EN-US>STDLIB.H</SPAN></A><SPAN
style="mso-bookmark: _Toc475103210"></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt"><O:P></O:P></SPAN></H3>
<P class=MsoNormal
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