// Class to perform some complex number operations
public class Complex {

  private double re = 0.0; // real part
  private double im = 0.0; // imaginary part

  public Complex() {} // do nothing
  public Complex( double a, double b ){
    setRe(a);
    setIm(b);
  }

  public void setRe( double a ){ re = a; }
  public void setIm( double b ){ im = b; }
  public double getRe(){ return re; }
  public double getIm(){ return im; }

  public Complex add( Complex z ){
    return (new Complex( re + z.getRe(), im + z.getIm() ));
  }

  public Complex subtract( Complex z ){
    return (new Complex( re - z.getRe(), im - z.getIm() ));
  }

  public void print(){
    System.out.print( "(" + getRe() + "," + getIm() + ")");
  }

  public static void main( String args[] ){
    Complex z1 = new Complex( 1, 2 );
    Complex z2 = new Complex( 3, 4 );

    z1.add(z2).print();
    System.out.println();

    z1.subtract(z2).print();
    System.out.println();
  }

}