import java.util.*;
import java.io.*;
import java.lang.Math;

class complextest
	{
	float re;
	float im;
	static float temp;
	/* Only one temp no matter how many instances of the class. */
	
	/* Main method for application. */
	public static void main(String args[])
		{
		/* Instantiate the complex structure variables */
		complextest z = new complextest(0F, 0F);
		/* Assign values to the complex numbers z1 and z2 */
		/* 1 + 0i */
		complextest z1 = new complextest(1F, 0F);
		/* 0 + 1i */
		complextest z2 = new complextest(0F, 1F);

		/* Print z1 and z2 */
		System.out.println("z1, z2: " + z1.re + "+" + z1.im + "i, "
			+ z2.re + "+" + z2.im + "i");

		/* Invoke the complextest.mul(z1,z2) method to get z1 times z2
		   and put the product in z */
		z.mul(z1,z2);
		/* Print z1*z2 */
		System.out.println("z1*z2: " + z.re + "+" + z.im + "i");
		}
	
	/* Methods for class complextest objects. "this" means the object
	   that invoked the method. */
	void mul(complextest x, complextest y)
		{
		temp = (x.re * y.re - x.im * y.im);
		/* The temporary variable keeps the new real component from
		   messing up the imaginary calculation if this is also x or y. */
		this.im = (x.im * y.re + x.re * y.im);
		this.re = temp;
		}
	void conjugate_mul(complextest x, complextest y)
		{
		temp = (x.im * y.re + x.re * y.im);
		this.im = (x.im * y.re - x.re * y.im);
		this.re = temp;
		}
	void div(complextest x, complextest y)
		{
		temp = ((x.re * y.re + x.im * y.im)/(y.re * y.re + y.im * y.im));
		this.im = ((x.im * y.re - x.re * y.im)/(y.re * y.re + y.im * y.im));
		this.re = temp;
		}
	
	/* Constructor */
	complextest(float re, float im)
		{
		this.re = re;
		this.im = im;
		}
	}