class A {
  public  integer data;
  local   integer addr;
  protected integer cmd;
  static integer credits;
  task new() {
    data = 100;
    addr = 200;
    cmd  = 1;
    credits = 10;
  }
  task printA() {
    printf ("value of data %0d in A\n", data);
    printf ("value of addr %0d in A\n", addr);
    printf ("value of cmd  %0d in A\n", cmd);
  }
}

class B extends A {
  task printB() {
    printf ("value of data %0d in B\n", data);
    // Below line will give compile error
    //printf ("value of addr %0d in B\n", addr);
    printf ("value of cmd  %0d in B\n", cmd);
  }
}

class C {
  A a;
  B b;
  task new() {
    a = new();
    b = new();
    b.data = 2;
  }
  task printC() {
    printf ("value of data %0d in C\n", a.data);
    printf ("value of data %0d in C\n", b.data);
    // Below line will give compile error
    //printf ("value of addr %0d in C\n", a.addr);
    //printf ("value of cmd  %0d in C\n", a.cmd);
    //printf ("value of addr %0d in C\n", b.addr);
    //printf ("value of cmd  %0d in C\n", b.cmd);
  }
}

program properties {
  C c = new();
  c.a.printA();
  c.b.printB();
  c.printC();
  printf("value of credits is %0d\n",c.a.credits); 
  printf("value of credits is %0d\n",c.b.credits); 
  c.a.credits ++;
  printf("value of credits is %0d\n",c.a.credits); 
  printf("value of credits is %0d\n",c.b.credits); 
  c.b.credits ++;
  printf("value of credits is %0d\n",c.a.credits); 
  printf("value of credits is %0d\n",c.b.credits); 
}