Completed

src/Complex.java

@@ -29,23 +29,37 @@ public class Complex {
 
   public double magnitude()
   {
-    return 1.0;
+    return Math.sqrt((real * real) + ((imag * imag)));
   }
 
   public double argument()
   {
-    return 1.0;
+    return Math.atan2(imag,real);
   }
 
   public String toString()
   {
-    return "";
+    if (imag == 0){return String.valueOf(real);}
+    else if (imag == 0 && real == 0) {return String.valueOf(0);}
+    else if(real == 0.0){
+      if(imag < 0){
+        return "-j" + String.valueOf(-1 * imag);
+      }
+      else{
+        return "j" + String.valueOf(imag);
+      }
+    }
+    else if(imag < 0){return String.valueOf(real) + " - j" + String.valueOf((-1) * imag);}
+    else {return String.valueOf(real) + " + j" + String.valueOf(imag);}
   }
 
   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;
   }