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Turbo C 2.0、Borland C++库函数及用例(5) printf("Graph err: %s\n", grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1); /* terminate with an error code */
}
midx = getmaxx() / 2;
midy = getmaxy() / 2; /* loop through the fill patterns */
for (i=SOLID_FILL; i<USER_FILL; i++)
{
/* set the fill style */
setfillstyle(i, getmaxcolor()); /* draw the bar */
bar(midx-50, midy-50, midx+50,
midy+50);
getch();
}
closegraph();
return 0;
}
函数名: bar3d
功 能: 画一个三维条形图
用 法: void far bar3d( int left, int top, int right,
int bottom, int depth,
int topflag);
程序例:
#include <graphics.h>
#include <stdlib.h>
#include <stdio.h>
#include <conio.h>int main(void)
{ /* request auto detection */
int gdriver = DETECT, gmode, errorcode;
int midx, midy, i; /* initialize graphics, local variables */
initgraph(&gdriver, &gmode, ""); /* read result of initialization */
errorcode = graphresult();
if (errorcode != grOk) /* an error occurred */
{
printf("Graph err: %s\n", grapherrormsg(errorcode));
printf("Press any key to halt:");
getch();
exit(1); /* terminate with error code */
} midx = getmaxx() / 2;
midy = getmaxy() / 2;
/* loop through the fill patterns */
for (i=EMPTY_FILL; i<USER_FILL; i++)
{
/* set the fill style */
setfillstyle(i, getmaxcolor());
/* draw the 3-d bar */
bar3d(midx-50, midy-50, midx+50, midy+50, 10, 1);
getch(); }
/* clean up */
closegraph();
return 0;
}
函数名: bdos
功 能: DOS系统调用
用 法: int bdos(int dosfun,unsigned dosdx,unsigned dosal);
程序例:#include <stdio.h>
#include <dos.h>/* Get current drive as 'A', 'B', ... */
char current_drive(void)
{
char curdrive; /* Get current disk as 0, 1, ... */
curdrive = bdos(0x19, 0, 0);
return('A' + curdrive);
}int main(void)
{
printf("The current drive is %c:\n", current_drive());
return 0;
}
函数名: bdosptr
功 能: DOS系统调用
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