E-Sources Informatics

Program Mencari Luas Lingkaran

import jeliot.io.*;

public class luas_lingkaran {
       
      public void masukan()
      {
           System.out.print("masukkan r = ");
           r = Input.readInt();
      }
      public void hitung_luas() {
          
           System.out.print("luas lingkaran =  ");
           System.out.print(Luas=3.14*r*r);
      }

private int r;
private float Luas;
        
    public static void main() {
        luas_lingkaran x = new luas_lingkaran();
        x.masukan();
        x.hitung_luas();
    }
}

import jeliot.io.*;

public class volume_bola {
       
      public void masukan()
      {
           System.out.print("masukkan r = ");
           r = Input.readInt();
      }
      public void hitung_volume() {
          
           System.out.print("volume bole =  ");
           System.out.print(v=4/3*(3.14*r*r*r));
      }

private int r;
private float v;
        
    public static void main() {
        volume_bola x = new volume_bole();
        x.masukan();
        x.hitung_volume();
    }
}