import java.io.*;
 import javax.swing.*;

 /* Konzolový vstup = okénkový vstup: soubor VstupOkenko.java*/
 /* Soucet a prumer tri cisel a,b,c */

 public class VstupOkenko {
     static double p;
     static int s, a, b, c;
  
  
     public static void main(String[] args)  {
         String promString;

         promString= JOptionPane.showInputDialog ("Zadej a:");
         a = Integer.parseInt(promString);

         promString= JOptionPane.showInputDialog ("Zadej b:");
         b = Integer.parseInt(promString);

         promString= JOptionPane.showInputDialog ("Zadej c:");
         c = Integer.parseInt(promString);
    
         s = a + b + c;
         System.out.println("soucet tri cisel s = " + s);
    
         p = (double) s / 3;
         System.out.println("prumer tri cisel p = " + p);
  
  }

}