#include <conio.h>
#include <graphics.h>
#include <dos.h>
#include <malloc.h>
#include <bios.h>

void *buff;

void Draw_Ball()
{
    setcolor(RED);
    setfillstyle(SOLID_FILL,RED);
    circle(40,40,10);
    floodfill(40,40,RED);
    buff = malloc(imagesize(30,30,50,50));
    getimage(30,30,50,50,buff);
    putimage(30,30,buff,XOR_PUT);
}

void main()
{
    int gd=DETECT,gm;
    int XCoord = 0, YCoord = 0;
    int dx = 5, dy = 5;
    initgraph(&gd,&gm,"c://turboc3//bgi ");
    setbkcolor(WHITE);
    Draw_Ball();
    int cur;
    while(cur != 0x4300)//F9
    {
        putimage(XCoord,YCoord,buff,XOR_PUT);
        delay(40);
        putimage(XCoord,YCoord,buff,XOR_PUT);

        XCoord += dx;
        YCoord += dy;

        if(XCoord <=0)
        {
            XCoord = 0;
            dx = 5;
            delay(20);
        }
        else if(XCoord >= getmaxx() - 32)
        {
            XCoord = getmaxx() - 32;
            dx = -5;
            delay(20);
        }

        if(YCoord <=0)
        {
            YCoord = 0;
            dy = 5;
            delay(20);
        }
        else if(YCoord >= getmaxy() - 32)
        {
            YCoord = getmaxy()-32;
            dy = -5;
            delay(20);
        }
        if(kbhit())
        {
            cur = bioskey(0);
            if(cur == 0x4B00)//left
            {
                dx = -5;
            }
            if(cur == 0x4D00)//right
            {
                dx = 5;
            }

            if(cur == 0x4800)//up
            {
                dy = -5;
            }
            if(cur == 0x5000)//down
            {
                dy = 5;
            }
        }
    }
    closegraph();
}