ok

Complex.java

 public class Complex 
 {
-
+ 
     public double real;
     public double imag;
-  
+   
     public Complex()
     {
       real = 0;
       imag = 0;
     }
-  
-  
+   
+   
     public Complex(double r, double i)
     {
       real = r;
       imag = i;
       double d = Math.atan2(i,r);
     }
-  
+   
     public double imag()
     {
       return imag;
     }
-  
+   
     public double real()
     { 
       return real;
     }
-  
+   
     public double magnitude()
     {
-      return 1.0;
+      double magnitude = Math.sqrt(Math.pow(this.real, 2) + Math.pow(this.imag, 2));
+      return magnitude;
     }
-  
+   
     public double argument()
     {
-      return 1.0;
+      return Math.atan2(imag,real);
     }
-  
+   
     public String toString()
     {
-      return "";
+      String imagString = Double.toString(imag);
+      String realString = Double.toString(real);
+      if (real !=0 ) 
+      {
+        if (imag !=0 ) 
+        {
+          if (imag < 0) 
+          {
+            String imagString2 = imagString.replace("-","");
+            return realString+" - "+"j"+imagString2;
+          }
+          return realString+" + "+"j"+imagString;
+        }
+        else 
+        {
+          return realString;
+        }
+      }
+      return realString;
     }
-  
+   
     public Complex add(Complex complexNum)
     {
       Complex answer = new Complex(0.0,0.0);
-  
+      answer.real = complexNum.real + real;
+      answer.imag = complexNum.imag + imag;
       return answer;
     }
-  
-  
-}
\ No newline at end of file
+   
+  }
\ No newline at end of file