函数名: floodfill
功 能: 填充一个有界区域
用 法: #include <graphics.h>
void far floodfill(int x, int y, int border);
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 maxx, maxy;
/* initialize graphics, local variables */
initgraph(&gdriver, &gmode, "");
/* 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 */
}
maxx = getmaxx();
maxy = getmaxy();
/* select drawing color */
setcolor(getmaxcolor());
/* select fill color */
setfillstyle(SOLID_FILL, getmaxcolor());
/* draw a border around the screen */
rectangle(0, 0, maxx, maxy);
/* draw some circles */
circle(maxx / 3, maxy /2, 50);
circle(maxx / 2, 20, 100);
circle(maxx-20, maxy-50, 75);
circle(20, maxy-20, 25);
/* wait for a key */
getch();
/* fill in bounded region */
floodfill(2, 2, getmaxcolor());
/* clean up */
getch();
closegraph();
return 0;
}