class Calculator
{
	public void add(int x,int y)
	{
		System.out.println(x+y);
	}
	public void add(int x,int y, int z)
	{
		System.out.println(x+y+z);
	}
	public void add(float x,float y)
	{
		System.out.println(x+y);
	}
	public int add(long x,long y)
	{
		return (x+y);
	}
	public static void main(String args[])
	{
		Calculator obj=new Calculator();
		obj.add(10,20);
		obj.add(10,20,30);
		obj,add(10.1f,20.2f);
		obj.add(10l,20l);
	}
}

		30
		60
		30.300001
		30

class person
{
	int age;
	String name;
	String address;
	void input()
	{
		age=21;
		name="ram";
		address="delhi";
	}
	void print()
	{
		System.out.println("name = "+name);
		System.out.println("age = "+age);
		System.out.println("address = "+address);
	}
}
class Emp extends person
{
	int empno;
	int deptno;
	void input()
	{
		super.input();
		empno=01;
		deptno=101;
	}
	void print()
	{
		super.print();
		System.out.println("employ no = "+empno);
		System.out.println("dept no. = "+deptno);
	}
}
class Customer extends person
{
	int custId;
	int custno;
	void input()
	{
		//super.input();
		name="smith";
		age=100;
		address="mumbai";
		custno=02;
		custId=1001;
	}
	void print()
	{
		super.print();
		System.out.println("custno = "+custno);
		System.out.println("custId = "+custId);
	}
}
public class TestOverriding
{
	public static void main(String s1[])
	{
		Emp emp=new Emp();
		emp.input();
		emp.print();
		Customer customer=new Customer();
		customer.input();
		customer.print();
	}
}

name = ram
age = 21
address = delhi
employ no = 1
dept no. = 101
name = smith
age = 100
address = mumbai
custno = 2
custId = 1001