Add Root Function and Product Function

MathKit/MPRootFunction.h

@@ -0,0 +1,46 @@
+//
+//  MPRootFunction.h
+//  MathPad
+//
+//  Created by Kim Wittenburg on 11.01.15.
+//  Copyright (c) 2015 Kim Wittenburg. All rights reserved.
+//
+
+#import "MPFunction.h"
+
+
+/*!
+ @header
+ This file contains the <code>MPRootFunction</code> class.
+ */
+
+
+
+@class MPRootFunction, MPExpression;
+
+
+/*!
+    @class      MPRootFunction
+    @abstract   This class represents an arbitrary root function.
+ 
+    @discussion A root has two children: An exponent and the expression to be
+                rooted.
+ */
+@interface MPRootFunction : MPFunction
+
+/*!
+    @property   exponentExpression
+    @abstract   The receiver's exponent.
+ */
+@property (nonatomic, strong) MPExpression *exponentExpression; /* Index 0 */
+
+
+/*!
+    @property   rootExpression
+    @abstract   The receiver's root expression.
+ 
+    @discussion The root expression is the expression that is to be rooted.
+ */
+@property (nonatomic, strong) MPExpression *rootExpression; /* Index 1 */
+
+@end