class base{
int a,b;
void showbase()
{
System.out.println(“A=”+a+”\nB=”+b);
}
void addbase(){
System.out.println(“a+b=”+(a+b));
}
}
class derived extends base{
int c;
void showderived(){
System.out.println(“C=”+c);
}
void derivedsum(){
System.out.println(“A+B+C=”+(a+b+c));
}
}
class mainclass{
public static void main(String args[]){

derived ob1=new derived();
ob1.a=20;
ob1.b=30;
System.out.println(“Base class”);
ob1.showbase();
ob1.addbase();
System.out.println(“Derived class”);
ob1.c=22;
ob1.showderived();
ob1.derivedsum();
}
}