package study;

public class demo1 {

    public static void main(String[] args) throws Exception{

        FuSu x=new FuSu(1,2);

        FuSu y=new FuSu(3,4);

        x.showa();

        x.showb();

        x.abs();

        FuSu z1=FuSu.jia(x,y);

        FuSu z2=FuSu.jian(x,y);

        FuSu z3=FuSu.cheng(x,y);

        FuSu z4=FuSu.chu(x,y);

        System.out.println("jia:"+z1.a+"+"+z1.b+"i");

        System.out.println("jia:"+z2.a+"+"+z2.b+"i");

        System.out.println("jia:"+z3.a+"+"+z3.b+"i");

        System.out.println("jia:"+z4.a+"+"+z4.b+"i");

    }

}

class FuSu{

    protected int a;

    protected int b;

    public FuSu(int a,int b){

        this.a=a;

        this.b=b;

    }

    public static FuSu jia(FuSu x1,FuSu x2){

        int a=x1.a+x2.a;

        int b=x1.b+x2.b;

        return new FuSu(a,b) ;

    }

    public static FuSu jian(FuSu x1,FuSu x2){

        int a=x1.a-x2.a;

        int b=x1.b-x2.b;

        return new FuSu(a,b) ;

    }

    public static FuSu cheng(FuSu x1,FuSu x2){

        int a=x1.a*x2.a-x1.b*x2.b;

        int b=x1.a*x2.b+x1.b*x2.a;

        return new FuSu(a,b);

    }

    public static FuSu chu(FuSu x1,FuSu x2) throws Exception{

        if(x2.a==0){

            throw new Exception("fusu2.a=0");

        }

        if(x2.b==0){

            throw new Exception("fusu2.b=0");

        }

        int a=(x1.a*x2.a+x1.b*x2.b)/(x2.a*x2.a+x2.b*x2.b);

        int b=(x1.b*x2.a-x1.a*x2.b)/(x2.a*x2.a+x2.b*x2.b);

        return new FuSu(a,b);

    }

    public void showa(){

        System.out.println(this.a);

    }

    public void showb(){

        System.out.println(this.b);

    }

    public void abs(){

        double x=Math.sqrt(this.a*this.a+this.b*this.b);

        System.out.println(x);

    }