fushu.java

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import  java.applet.* ;      
import  java.awt.* ;
public  class  FuShu  extends  Applet    
{
   Complex a,b,c ;
   public  void  init( )    
   {
     a = new  Complex(1,2);   
     b = new  Complex(3,4);   
     c = new  Complex();     
   }

   public  void  paint(Graphics  g)    
   {
     c=a.complexAdd(b);
     g.drawString("第一个复数："+a.toString(),10,50);
     g.drawString("第二个复数："+b.toString(),10,70);
     g.drawString("两复数之和："+c.toString(),10,90);
   }
}
    
class  Complex
{
    int  RealPart ;      
    int  ImaginPart ;  
    Complex() { RealPart = 0 ; ImaginPart = 0 ; }  
    Complex(int  r , int  i)    
    {  RealPart = r ;    ImaginPart = i ;   }
    Complex  complexAdd(Complex  a)  

    {
         Complex  temp = new  Complex( ); 
         temp.RealPart=RealPart+a.RealPart;
         temp.ImaginPart=ImaginPart+a.ImaginPart;
         return  temp;
    }
    public String  toString( )         
    {   return  ( RealPart+" + "+ImaginPart+" i ");   }
}