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<PRE> </PRE>
<PRE>函數大全(o開頭)
</PRE>
<PRE>函數名: <font size="5" color="#FF0000">open </font>
功 能: 打開一個文件用于讀或寫
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[] = "Hello world"; </PRE>
<PRE>if ((handle = open("TEST.$$$", O_CREAT | O_TEXT)) == -1)
{
perror("Error:");
return 1;
}
write(handle, msg, strlen(msg));
close(handle);
return 0;
}
</PRE>
<PRE>函數名: <font size="5" color="#FF0000">outport </font>
功 能: 輸出整數到硬件端口中
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("Value %d sent to port number %d\n", value, port);
return 0;
}
</PRE>
<PRE>函數名:<font size="5" color="#FF0000"> outportb </font>
功 能: 輸出字節到硬件端口中
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("Value %d sent to port number %d\n", value, port);
return 0;
}
</PRE>
<PRE>函數名: <font size="5" color="#FF0000">outtext </font>
功 能: 在視區顯示一個字符串
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(&gdriver, &gmode, ""); </PRE>
<PRE>/* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
printf("Graphics error: %s\n", grapherrormsg(errorcode));
printf("Press any key to halt:");
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("This ");
outtext("is ");
outtext("a ");
outtext("test."); </PRE>
<PRE>/* clean up */
getch();
closegraph();
return 0;
}
</PRE>
<PRE>函數名: <font size="5" color="#FF0000">outtextxy</font>
功 能: 在指定位置顯示一字符串
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( &gdriver, &gmode, ""); </PRE>
<PRE>/* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
printf("Graphics error: %s\n", grapherrormsg(errorcode));
printf("Press any key to halt:");
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, "This is a test."); </PRE>
<PRE>/* clean up */
getch();
closegraph();
return 0;
}
</PRE>
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<pre></pre>
<pre>資料收集：beck Copyright 2004 張求熙, 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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