import java.awt.*;
import java.applet.*;
public class p2 extends Applet
{
    double pi=3.14159265,r,s,p;
    public void paint(Graphics g)
    {
        r=4.0;
        s=pi*r*r;
        p=2*pi*r;           
        g.drawString("圓面積="+s,25,25);
        g.drawString("圓周長(zhǎng)="+p,25,45);
    }
}