📄 第五章 keil c51库函数参考.htm
字号:
align=left><B><SPAN lang=EN-US
style="FONT-SIZE: 16pt; FONT-FAMILY: 黑体; mso-fareast-font-family: 宋体"> <O:P></O:P></SPAN></B></P>
<H3 style="MARGIN-LEFT: 0cm; TEXT-INDENT: 0cm"><A
name=_Toc475103204><SPAN lang=EN-US style="FONT-SIZE: 15pt">4.
</SPAN>缓冲区处理函数位于“<SPAN lang=EN-US>string.h”中</SPAN></A></H3>
<P class=MsoBodyTextFirstIndent>其中包括拷贝比较移动等函数如：</P>
<P class=MsoBodyTextFirstIndent><SPAN lang=EN-US>memccpy
memchr memcmp memcpy memmove memset</SPAN></P>
<P class=MsoBodyTextFirstIndent>这样很方便地对缓冲区进行处理。</P>
<H3 style="MARGIN-LEFT: 0cm; TEXT-INDENT: 0cm"><A
name=_Toc475103205><SPAN lang=EN-US style="FONT-SIZE: 15pt">5.
</SPAN>输入输出流函数，位于“<SPAN lang=EN-US>stdio.h”中</SPAN></A></H3>
<P class=MsoBodyTextFirstIndent>流函数通<SPAN
lang=EN-US>8051的串口或用户定义的I/O口读写数据，缺省为8051串口，如要修改，比如改为LCD显示，可修改lib目录中的getkey.c及putchar.c源文件，然后在库中替换它们即可。</SPAN></P>
<H2 style="MARGIN-LEFT: 0cm; TEXT-INDENT: 0cm"><A
name=_Toc475103206><SPAN lang=EN-US
style="FONT-SIZE: 16pt">第三节 </SPAN><SPAN lang=EN-US>Keil
C51库函数原型列表</SPAN></A></H2>
<H3 style="MARGIN-LEFT: 0cm; TEXT-INDENT: 0cm"><A
name=_Toc475103207><SPAN lang=EN-US style="FONT-SIZE: 15pt">1.
</SPAN><SPAN lang=EN-US>CTYPE.H</SPAN></A><SPAN
style="mso-bookmark: _Toc475103207"></SPAN><SPAN lang=EN-US
style="FONT-SIZE: 12pt"><O:P></O:P></SPAN></H3>
<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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>isalnum(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>isalpha(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>iscntrl(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>isdigit(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>isgraph(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>islower(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>isprint(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>ispunct(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>isspace(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>isupper(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>isxdigit(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>toascii(char
c)；</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">bit<SPAN
style="mso-spacerun: yes"> </SPAN>toint(char
c)；</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-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">char<SPAN
style="mso-spacerun: yes"> </SPAN>tolower(char
c)；</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-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">char<SPAN
style="mso-spacerun: yes"> </SPAN>__tolower(char
c)；</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-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">char<SPAN
style="mso-spacerun: yes"> </SPAN>toupper(char
c)；</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-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">char<SPAN
style="mso-spacerun: yes"> </SPAN>__toupper(char
c)；</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>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -