函数名: setfillstyle 
 功  能: 设置填充模式和颜色 
 用  法: #include <graphics.h> 
         void far setfillstyle(int pattern, int color); 
 程序例: 
#include <graphics.h> 
 #include <stdlib.h> 
 #include <string.h> 
 #include <stdio.h> 
 #include <conio.h> 
/* the names of the fill styles supported */ 
 char *fname[] = { "EMPTY_FILL", 
                   "SOLID_FILL", 
                   "LINE_FILL", 
                   "LTSLASH_FILL", 
                   "SLASH_FILL", 
                   "BKSLASH_FILL", 
                   "LTBKSLASH_FILL", 
     "HATCH_FILL", 
                   "XHATCH_FILL", 
                   "INTERLEAVE_FILL", 
                   "WIDE_DOT_FILL", 
                   "CLOSE_DOT_FILL", 
     "USER_FILL" 
                 }; 
int main(void) 
 { 
    /* request auto detection */ 
    int gdriver = DETECT, gmode, errorcode; 
    int style, midx, midy; 
    char stylestr[40]; 
   /* initialize graphics and 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 */ 
    } 
   midx = getmaxx() / 2; 
    midy = getmaxy() / 2; 
   for (style = EMPTY_FILL; style < USER_FILL; style++) 
    { 
       /* select the fill style */ 
       setfillstyle(style, getmaxcolor()); 
      /* convert style into a string */ 
       strcpy(stylestr, fname[style]); 
      /* fill a bar */ 
       bar3d(0, 0, midx-10, midy, 0, 0); 
      /* output a message */ 
       outtextxy(midx, midy, stylestr); 
      /* wait for a key */ 
       getch(); 
       cleardevice(); 
    } 
   /* clean up */ 
    getch(); 
    closegraph(); 
    return 0; 
 }