#include<stdio.h>#include<graphics.h>#include<math.h>#include<stdlib.h>#include<dos.h>#include<conio.h>#include<time.h> #define PI 3.1415926 void output_text() /*输出文本*/ { outtextxy(120,200,"Dear friends:"); outtextxy(120,215," Do you know ,everything in the space i...