Calculator Test

import java.util.*;
public class tester
{
    public static void main (String args []){
        Scanner in = new Scanner(System.in);
        double a,b;
        Calculator c1 = new Calculator ();

        Calculator c2 = new Calculator ("***NLCS CALCULATOR***");

        System.out.println(c1.getName());
        System.out.println("The result of 3 + 3 is "+c1.add(3,3));
        System.out.println("The result of 9 + 4 + 6 is "+c1.add(9,4,6));

        System.out.println(c2.getName());
        System.out.println("Enter the value of a.");
        a = in.nextDouble();
        System.out.println("Enter the value of b.");
        b = in.nextDouble();
        System.out.println("The result of " + a + " + " + b + " is "+c2.add(a,b));
        System.out.println("The result of " + a + " * " + b + " is "+c2.multiply(a,b));
        System.out.println("The result of " + a + " / " + b + " is "+c2.divide(a,b));
        System.out.println("The result of " + a + " % " + b + " is "+c2.modulus(a,b));
    }
}