import java.io.*;
public class Main
{
public static void main(String[] args)
{
complex_number a = new complex_number(1, 1);
complex_number b = new complex_number(2, 2);
complex_number c = complex_number.add(a, b);
complex_number d = a.add(b);
System.out.println(a);
System.out.println(b);
System.out.println(c);
System.out.println(d);
}
}
public class complex_number
{
private double _real;
private double _imag;
public complex_number(double real, double imag)
{
_real = real;
_imag = imag;
}
public complex_number add(complex_number other)
{
_real += other._real;
_imag += other._imag;
return this;
}
public static complex_number add(complex_number a, complex_number b)
{
return new complex_number(a._real + b._real, a._imag + b._imag);
return null;
}
public complex_number subtract(complex_number other)
{
_real -= other._real;
_imag -= other._imag;
return this;
}
public static complex_number subtract(complex_number a, complex_number b)
{
return new complex_number(b._real - a._real, b._imag - a._imag);
return null;
}
public complex_number multiply(complex_number other)
{
_real = _real * other._real;
_imag = _imag * other._imag;
return this;
}
public static complex_number multiply(complex_number a, complex_number b)
{
return new complex_number(a._real * b._real - a._imag * b._imag);
return new complex_number(a._real * b._imag + b._real * a._imag);
return null;
}
public complex_number divide(complex_number other)
{
_real = _real / other._real;
_imag = _imag / other._imag;
return this;
}
public static complex_number divide(complex_number a, complex_number b)
{
double real, imag, deno;
deno = (b._real * b._real + b._imag * b._imag);
return new complex_number(a._real * b._real + a._imag * b._imag)/deno;
return new complex_number(b._real * a._imag - a._real * b._imag)/deno;
return null;
}
public String toString()
{
return String.format("(%f, %fj)", _real, _imag);
}
}
