函数名: getpixel 功  能: 取得指定像素的颜色 用  法: #include         int far getpixel(int x, int y); 程序例:

#include #include #include #include #include

#define PIXEL_COUNT 1000 #define DELAY_TIME  100  /* in milliseconds */

int main(void) {    /* request auto detection */    int gdriver = DETECT, gmode, errorcode;    int i, x, y, color, maxx, maxy,        maxcolor, seed;

/* initialize graphics and local variables */    initgraph(&gdriver, &gmode, "");

/* read result of initialization */    errorcode = graphresult(); /* an error occurred */    if (errorcode != grOk)    {       printf("Graphics error: %s\n",              grapherrormsg(errorcode));       printf("Press any key to halt:");       getch(); /* terminate with an error code */       exit(1);    }

   maxx = getmaxx() + 1;    maxy = getmaxy() + 1;    maxcolor = getmaxcolor() + 1;

   while (!kbhit())    { /* seed the random number generator */       seed = random(32767);       srand(seed);       for (i=0; i