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📁 C语言函数库,包含所有的C语言函数
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<PRE>　</PRE>

<PRE>函数大全(o开头)
</PRE>
<PRE>函数名: <font size="5" color="#FF0000">open </font>
功 能: 打开一个文件用于读或写 
用 法: int open(char *pathname, int access[, int permiss]); 
程序例: </PRE>
<PRE>#include 
#include 
#include 
#include </PRE>
<PRE>int main(void) 
{ 
int handle; 
char msg[] = &quot;Hello world&quot;; </PRE>
<PRE>if ((handle = open(&quot;TEST.$$$&quot;, O_CREAT | O_TEXT)) == -1) 
{ 
perror(&quot;Error:&quot;); 
return 1; 
} 
write(handle, msg, strlen(msg)); 
close(handle); 
return 0; 
} 

</PRE>
<PRE>函数名: <font size="5" color="#FF0000">outport </font>
功 能: 输出整数到硬件端口中 
用 法: void outport(int port, int value); 
程序例: </PRE>
<PRE>#include 
#include 
int main(void) 
{ 
int value = 64; 
int port = 0; </PRE>
<PRE>outportb(port, value); 
printf(&quot;Value %d sent to port number %d\n&quot;, value, port); 
return 0; 
} 

</PRE>
<PRE>函数名:<font size="5" color="#FF0000"> outportb </font>
功 能: 输出字节到硬件端口中 
用 法: void outportb(int port, char byte); 
程序例: </PRE>
<PRE>#include 
#include </PRE>
<PRE>int main(void) 
{ 
int value = 64; 
int port = 0; </PRE>
<PRE>outportb(port, value); 
printf(&quot;Value %d sent to port number %d\n&quot;, value, port); 
return 0; 
} 

</PRE>
<PRE>函数名: <font size="5" color="#FF0000">outtext </font>
功 能: 在视区显示一个字符串 
用 法: void far outtext(char far *textstring); 
程序例: </PRE>
<PRE>#include 
#include 
#include 
#include </PRE>
<PRE>int main(void) 
{ 
/* request auto detection */ 
int gdriver = DETECT, gmode, errorcode; 
int midx, midy; </PRE>
<PRE>/* initialize graphics and local variables */ 
initgraph(&amp;gdriver, &amp;gmode, &quot;&quot;); </PRE>
<PRE>/* read result of initialization */ 
errorcode = graphresult(); 
if (errorcode != grOk) /* an error occurred */ 
{ 
printf(&quot;Graphics error: %s\n&quot;, grapherrormsg(errorcode)); 
printf(&quot;Press any key to halt:&quot;); 
getch(); 
exit(1); /* terminate with an error code */ 
} </PRE>
<PRE>midx = getmaxx() / 2; 
midy = getmaxy() / 2; </PRE>
<PRE>/* move the C.P. to the center of the screen */ 
moveto(midx, midy); </PRE>
<PRE>/* output text starting at the C.P. */ 
outtext(&quot;This &quot;); 
outtext(&quot;is &quot;); 
outtext(&quot;a &quot;); 
outtext(&quot;test.&quot;); </PRE>
<PRE>/* clean up */ 
getch(); 
closegraph(); 
return 0; 
} 

</PRE>
<PRE>函数名: <font size="5" color="#FF0000">outtextxy</font> 
功 能: 在指定位置显示一字符串 
用 法: void far outtextxy(int x, int y, char *textstring); 
程序例: </PRE>
<PRE>#include 
#include 
#include 
#include </PRE>
<PRE>int main(void) 
{ 
/* request auto detection */ 
int gdriver = DETECT, gmode, errorcode; 
int midx, midy; </PRE>
<PRE>/* initialize graphics and local variables */ 
initgraph( &amp;gdriver, &amp;gmode, &quot;&quot;); </PRE>
<PRE>/* read result of initialization */ 
errorcode = graphresult(); 
if (errorcode != grOk) /* an error occurred */ 
{ 
printf(&quot;Graphics error: %s\n&quot;, grapherrormsg(errorcode)); 
printf(&quot;Press any key to halt:&quot;); 
getch(); 
exit(1); /* terminate with an error code */ 
} </PRE>
<PRE>midx = getmaxx() / 2; 
midy = getmaxy() / 2; </PRE>
<PRE>/* output text at the center of the screen*/ 
/* Note: the C.P. doesn't get changed.*/ 
outtextxy(midx, midy, &quot;This is a test.&quot;); </PRE>
<PRE>/* clean up */ 
getch(); 
closegraph(); 
return 0; 
} 



</PRE>

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<pre></pre>
<pre>资料收集：beck Copyright 2004 张求熙, All Rights Reserved</pre>
<pre><a href="mailto:Email:qiuxi1984@126.com">Email:qiuxi1984@126.com</a>     QQ:35540948 </pre>
<PRE> </PRE>
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