복소수 클래스 (Complex)

class Complex{
	public double real;
	public double image;
	
	Complex(double r, double i){
		real = r;
		image = i;
	}
	public Complex addComplex(Complex c) {
		Complex c0 = new Complex(0,0);
		c0.real = real + c.real;
		c0.image = image + c.image;
		return c0;
	}
	public Complex subComplex(Complex c) {
		Complex c0 = new Complex(0,0);
		c0.real = real - c.real;
		c0.image = image - c.image;
		return c0;
	}
	public Complex mulComplex(Complex c) {
		Complex c0 = new Complex(0,0);
		c0.real = real * c.real - image * c.image;
		c0.image = real * c.image + image * c.real;
		return c0;
	}
	public Complex divComple(Complex c) {
		Complex c0 = new Complex(0,0);
		c0.real = (real * c.real + image * c.image) / 
			(c.real * c.real + c.image * c.image);
		c0.image = (image * c.real - real * c.image) / 
			(c.real * c.real + c.image * c.image);
		return c0;
	}
	public String toString() {
		String form = "(" + real + ", " + image + "i)";
		return form;
	}
}

public class chp5_7 {
	public static void main(String[] args) {
		Complex c1 = new Complex(1,2);
		Complex c2 = new Complex(3,4);
		Complex c3 = new Complex(5,6);
		Complex c4 = new Complex(7,8);
		
		c1 = c1.addComplex(c2);
		c2 = c2.subComplex(c3);
		c3 = c3.mulComplex(c4);
		c4 = c4.divComple(c1);
		
		System.out.print("c1 = " + c1 + ", c2 = " + c2 + 
				", c3 = " + c3 + ", c4 = " + c4);
	}
}