//**************************************
//     
// Name: bouncing a ball
// Description:bouncing a ball
// By: Rakshit Desai
//
//This code is copyrighted and has// limited warranties.Please see http://
//     www.Planet-Source-Code.com/xq/ASP/txtCod
//     eId.3360/lngWId.3/qx/vb/scripts/ShowCode
//     .htm//for details.//**************************************
//     

#include<graphics.h>
#include<alloc.h>
    main(){
    int changedirnx(int xcur);
    int changedirny(int ycur);
    int gd=DETECT,gm,area,m,n,xmin=0,xmax=630,ymin=0,ymax=470,xcur=300,ycur=30;
    char *buff;
    int xch,ych,ini=0;
    //if(registerbgidriver(EGAVGA_driver)<
    //     ;0)exit();
    initgraph(&gd;,&gm;," ");
    cleardevice();
    setcolor(3);
    outtextxy(225,185,"B O U N C I N G B A L L");
    getch();
    cleardevice();
    setcolor(7);
    rectangle(2,2,630,479);
    rectangle(3,3,629,478);
    setcolor(13);
    circle(7,7,3);setfillstyle(SOLID_FILL,13);floodfill(7,7,13);
    area=imagesize(4,4,11,11);
    buff=malloc(area);
    getimage(4,4,11,11,buff);
    setcolor(0);
    circle(7,7,3);setfillstyle(SOLID_FILL,0);floodfill(7,7,0);
        while(!kbhit()){
        delay(200);if(ini!=0)putimage(m,n,buff,XOR_PUT);
        m=xcur;n=ycur; ini=1;
        putimage(xcur,ycur,buff,XOR_PUT);
        if(xcur>xmax || xcur<xmin)xch=changedirnx(xcur);
        if(ycur>ymax || ycur<ymin)ych=changedirny(ycur);
        if(xch==1)xcur++;else xcur--;
        if(ych==1)ycur++;else ycur--;}
        closegraph();restorecrtmode();
        clrscr();printf("Thank You.\n");
        getch();
    }

    /*-----------------end of main()-------------------*/
        changedirnx(int xcur){
        int xch;
        if(xcur>630)xch=0;
        if(xcur<0)xch=1;
        sound(100);delay(80);nosound();
        return(xch);}
            changedirny(int ycur){
            int ych;
            if(ycur>460)ych=0;
            if(ycur<0)ych=1;
            sound(100);delay(80);nosound();
            return(ych);
        }