Involute

//    CODE FOR FUN BY AMI :)
#include<graphics.h>
#include<dos.h>
#include<conio.h>
#include<iostream.h>

void draw(int no)
{
    int gd= DETECT, gm;
    initgraph(&gd, &gm, "c:\\turboc3\\bgi");
    clearviewport();
    rectangle(1, 1, getmaxx(), getmaxy());
    setbkcolor(WHITE);
    setcolor(RED);
    int start = 0, end = 1, rad=1;

    for(int i=1; i<=(no*360); i++)
    {
        arc(getmaxx()/2, (getmaxy()-5)/2, start+i, end+i, rad + (i/15));
        delay(10);
    }

}

void main()
{
    int no;
    cout<<"How many tracks you want to show ? ";
    cin>>no;
    clrscr();
    draw(no);
    getch();
}