import java.io.*;
public class ComplexOper
{
   public static void main(String args[])
   {
      ComplexNumber cn=new ComplexNumber(4.0,8.0);
      ComplexNumber cy=new ComplexNumber();
      double a=Double.parseDouble(args[0]);
      double b=Double.parseDouble(args[1]);
      cy.setRealPart(a);
      cy.setImaginaryPart(b);
      
      String add=cn.complexAdd(cy);
     
      String muti=cn.complexMulti(cy);
      System.out.print("两复数相加："+add+"\n"+"两复数相乘："+muti);
      
      
   }
}
class ComplexNumber
{
   private double m_dRealPart;  //实部
   private double m_dImaginPart; //虚部
  ComplexNumber()
  {
  }
  ComplexNumber(double r,double i)
   {
       m_dRealPart=r;
       m_dImaginPart=i;
   }
   public double getRealPart()
   {
       return m_dRealPart;
   }
   public double getImaginaryPart()
   {
      return m_dImaginPart;
   }
   public double setRealPart(double d)
   {
      m_dRealPart=d;
      return m_dRealPart;
   }
   public double setImaginaryPart(double d)
   {
       m_dImaginPart=d;
       return m_dImaginPart;
   }
   
   //当前复数对象与形参复数对象相加，所得复数值返回给调用者。
   public double complexAdd(ComplexNumber c)
   {
     String s;
     double a,b;
     a=this.m_dRealPart+c.m_dRealPart;
     b=this.m_dImaginPart+c.m_dImaginPart;
     
     if(b<0)
       s=""+a+"-"+Math.abs(b)+"i";
     else
       s=""+a+"+"+b+"i";
     return s ;
   }
/*   //当前复数对象与形参实数对象相加，所得复数俚返回给调用者。
   complexAdd(double c)
   {
   }
 //当前复数对象与形参复数对象相减
   complexMinus(ComplexNumber c)
   {
   }
*/
//当前复数对象与形参复数对象相乘
   public String complexMulti(ComplexNumber c)
   {
     String s;
     double a,b;
     if((this.m_dRealPart==c.m_dRealPart)&&(this.m_dImaginPart==-c.m_dImaginPart))
        {  //共轭复数相乘
          a=m_dRealPart*m_dRealPart+m_dImaginPart*m_dImaginPart;
          s=""+a;
        }
     else
        {  //普通复数相乘
          a=this.m_dRealPart*c.m_dRealPart-this.m_dImaginPart*c.m_dImaginPart;
          b=this.m_dRealPart*c.m_dImaginPart+this.m_dImaginPart*c.m_dRealPart;
          if(b<0)
            s=""+a+b+"i";
          else 
            s=""+a+"+"+b+"i";
        }
     return s;
   }
/*
//当前复数对象与形参复数对象相除
   complexDiv(ComplexNumber c)
   {
   }
*/
   public String toString()
   {
      String s=""+m_dRealPart+"+"+m_dImaginPart+"i";
      return s;
   }
}