8.Complex

import java.lang.*;
import java.util.*;
class complex
{
    double r,i;
    complex()
    {}
    complex(double m,double n)
    {
        r = m;
        i = n;
    }
    complex add(complex b)
    {
        complex temp = new complex();
        temp.r = r+(b.r);
        temp.i = i+(b.i);
        return temp;
    }
    void subtraction(complex a,complex b)
    {
        r = (a.r) - (b.r);
        i = (a.i) - (b.i);
    }
    void display()
    {
        System.out.println(r+" +i "+i);
    }
    static complex multiply(complex a,complex b)
    {
        complex temp = new complex();
        temp.r = ((a.r)*(b.r))-((a.i)*(b.i));
        temp.i = ((a.r)*(b.i))+((a.i)*(b.i));
        return temp;
    }
    void division(complex a,complex b)
    {
        r = ((a.r * b.r)+(a.i * b.i))/((b.r * b.r)+(b.i * b.i));
        i = (-1)*((a.r * b.i)-(a.i * b.r))/((b.r * b.r) + (b.i * b.i));
    }
    public static void main(String args[])
    {
        complex a = new complex(2,3);
        complex b = new complex(9,2);
        complex c = a.add(b);
        c.display();
        c.subtraction(a,b);
        c.display();
        c=multiply(a,b);
        c.display();
        c.division(a,b);
        c.display();
    }
}