写出下面程序的运行结果

import java.io.* ;

   public class abc

   {

         public static void main(String args[ ])

         {

System.out.println("a="+a+"
b="+b);  

}

    }

    class SubClass extends SuperClass

    {  int c;

       SubClass(int aa, int bb, int cc)

       {   

super(aa, bb);

           c=cc;

       }

    }

   class SubSubClass extends SubClass

   {   int a;

       SubSubClass(int aa, int bb, int cc)

       {   super(aa, bb, cc);

           A = aa+bb+cc;

        }

       void show()

       {  

System.out.println("a="+a+"
b="+b+"
c="+c);  

}

  }