急用C语言的雪花代码 请高手指教谢谢了~~！

# include <dos.h> # include <time.h> # include <conio.h> # include <stdio.h> # include <stdlib.h> # include <graphics.h> struct Snow //雪的结构体 { int x; int y; int size; int speed; }snow[200]; int snownum=0; /