Write a Program control a ball using arrow keys.

 

Write a Program control a ball using arrow keys.

1. #include<graphics.h>  
2. #include<stdio.h>  
3. void main()  
4. {  
5.     intgd=DETECT,gm,x,y,r=40;  
6.     charch;  
7.     initgraph(&gd,&gm,"C:/TURBOC3/BGI");  
8.     setbkcolor(3);  
9.     x=getmaxx()/2;  
10.     y=getmaxy()/2;  
11.     setfillstyle(1,RED);  
12.     circle(x,y,r);  
13.     floodfill(x,y,getmaxcolor());  
14.     while((ch=getch())!=13)  
15.       {  
16.         switch(ch)  
17.                      {  
18.             case 75:    if(x>=r+1)  
19.                                 {  
20.                     cleardevice();  
21.                     circle(x-=10,y,r);  
22.                     floodfill(x,y,getmaxcolor());  
23.                           }  
24.                 break;  
25.             case 72:    if(y>=r+1)  
26.                                 {  
27.                     cleardevice();  
28.                     circle(x,y-=10,r);  
29.                     floodfill(x,y,getmaxcolor());  
30.                                   }  
31.                 break;  
32.             case 77:    if(x<=(getmaxx()-r-10))  
33.                                {  
34.                     cleardevice();  
35.                     circle(x+=10,y,r);  
36.                     floodfill(x,y,getmaxcolor());  
37.                                 }  
38.                 break;  
39.             case 80:    if(y<=(getmaxy()-r-10))  
40.                                {  
41.                     cleardevice();  
42.                     circle(x,y+=10,r);  
43.                     floodfill(x,y,getmaxcolor());  
44.                  }  
45.         }  
46.     }  
47.     getch();  
48. }  

Output