很不错的程序！
#include<stdio.h>
#include<conio.h>
#include<dos.h>
#include<math.h>
#include<bios.h>
#include<graphics.h>
#include<stdlib.h>
#define p1 3.14159
void moon()
{int x=50,y=50,n=30;
setcolor(YELLOW);
setfillstyle(1,YELLOW);
ellipse(x,y,0,360,n,n);
ellipse(x+n/2,y,90,270,n,n);
floodfill(x-n+3,y,YELLOW);
setcolor(BLACK);
circle(x,y,n);
circle(x+n/2,y,n);
}................
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