/****Lab 7 for 25th September 2008*******/

class Complex
{
	private double real;
	private double imag;

	public Complex(double r,double i)
	{
		real = r;
		imag =i;
	}
	public Complex()
	{
		real=0;
		imag=0;
	}
	public Complex add(Complex c)
	{
		double real;
		double imag;
		real = this.real+c.real;
		imag = this.imag+c.imag;
		return new Complex(real,imag);
	}
	public Complex subtract(Complex c)
        {
		double real;
                double imag;
                real = this.real-c.real;
                imag = this.imag-c.imag;
                return new Complex(real,imag);
        }
        public Complex multiply(Complex c)
        {
                double real;
                double imag;
              	real = this.real*c.real-this.imag*c.imag;
                imag = this.imag*c.real+this.real*c.imag;
                return new Complex(real,imag);
        }
        public Complex divide(Complex c)
        {
                double real;
                double imag;
		real = (this.real*c.real+this.imag*c.imag)/(c.real*c.real+c.imag*c.imag);
                imag = (this.imag*c.real-this.real*c.imag)/(c.real*c.real+c.imag*c.imag);
                return new Complex(real,imag);
        }
        public Complex inverse()
        {
                double real;
                double imag;
                real = this.real/(this.real*this.real+this.imag*this.imag);
                imag = -this.imag/(this.real*this.real+this.imag*this.imag);
                return new Complex(real,imag);
        }
        public Complex conjugate()
        {
                return  new Complex(this.real,-this.imag);
        }
	public double modulus()
	{
		double result = Math.sqrt(this.real*this.real+this.imag*this.imag);
		return result;
	}
 	public double getReal()
	{
		return (this.real);
	}
    	public void setReal(double real)
	{
		this.real = real;
	}
    	public double getImaginary()
	{
		return (this.imag);
	}
    	public void setImaginary(double imag)
	{
		this.imag = imag;
	}
     	public void display()
	{
		System.out.println("the real part = " + this.real);
		System.out.println(" the imagianry part = " + this.imag);
	}
}