C语言函数大全(d开头)

文章作者 100test 发表时间 2007:03:10 17:26:35
来源 100Test.Com百考试题网

函数名: delay
功 能: 将程序的执行暂停一段时间(毫秒)
用 法: void delay(unsigned milliseconds).
程序例:
/* Emits a 440-Hz tone for 500 milliseconds */
#include
int main(void)
{
sound(440).
delay(500).
nosound().
return 0.
}

函数名: delline
功 能: 在文本窗口中删去一行
用 法: void delline(void).
程序例:
#include
int main(void)
{
clrscr().
cprintf("The function DELLINE 0deletes \
the line containing the\r\n").
cprintf("cursor and moves all lines \
below it one line up.\r\n").
cprintf("DELLINE operates within the \
currently active text\r\n").
cprintf("window. Press any key to \
continue . . .").
gotoxy(1,2). /* Move the cursor to the
second line and first column */
getch().
delline().
getch().
return 0.
}

函数名: detectgraph
功 能: 通过检测硬件确定图形驱动程序和模式
用 法: void far detectgraph(int far *graphdriver, int far *graphmode).
程序例:
#include
#include
#include
#include
/* names of the various cards supported */
char *dname[] = { "requests detection",
"a CGA",
"an MCGA",
"an EGA",
"a 64K EGA",
"a monochrome EGA",
"an IBM 8514",
"a Hercules monochrome",
"an AT&.T 6300 PC",
"a VGA",
"an IBM 3270 PC"
}.
int main(void)
{
/* returns detected hardware info. */
int gdriver, gmode, errorcode.
/* detect graphics hardware available */
detectgraph(&.gdriver, &.gmode).
/* read result of detectgraph call */
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 */
}
/* display the information detected */
clrscr().
printf("You have %s video display \
card.\n", dname[gdriver]).
printf("Press any key to halt:").
getch().
return 0.
}