Answer / tsigereda

#include<dos.h>
#include<iostream.h>
#include<graphics.h>
#include<math.h>
#include<conio.h>
void *ball;
void image()
{
//ball
//setcolor(RED);
setfillstyle(SOLID_FILL,RED);
fillellipse(10,10,10,10);
//ball=malloc(imagesize(0,0,50,50));
//getimage(0,0,50,50,ball);
cleardevice();
}
void main()
{

int d=DETECT,m;
initgraph(&d,&m,"C:\\tc\\bgi");
float x=1,y=0.00000,j=.5,count=.1;
float r=15;
int l=getmaxx()/2,t=0;

image();
setbkcolor(GREEN);

setcolor(30);
line(0,450,650,450);
sleep(1);
for(int k=0;k<=7;k++)
{

for(float i=90;i<270;i+=10)
{
y=cos(((i*22/7)/180))/j;

if(y>0)
y=-y;
x+=5;

setcolor(14);
setfillstyle(1,14);
circle(x,y*200+400,r);
floodfill(x,y*200+400,14);


delay(100);

setcolor(0);
setfillstyle(1,0);
circle(x,y*200+400,r);
floodfill(x,y*200+400,0);

}

j+=count;
count+=.1;
}
getch();
}

Answer / tsigereda

which is animate downward gravitational force.

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