Added Main Menu Class

MainMenu.java

@@ -0,0 +1,40 @@
+
+/**
+ * Scientific Calculator Lab
+ * 
+ * This class will create the instance of the "Main Menu"
+ * 
+ * This serves to display the options the user can take to use the calculator
+ * 
+ * 1: Basic Menu - 4 basic functions + - * /
+ * 2: Advanced Menu - Exponents & inverse
+ * 3: Scientific Menu - Base Conversions, Memory Functions, Trig Options
+ * 
+ * The point of this method is for the MAIN Application while loop.
+ * Whenever the user opens the calculator OR completes an action
+ * in the submenus, the calculator will return to this main menu.
+ */
+public class MainMenu
+{
+    // instance variables - replace the example below with your own
+    private int x;
+
+    /**
+     * Constructor for objects of class MainMenu
+     */
+    public MainMenu()
+    {
+        // initialise instance variables
+        x = 0;
+    }
+
+    /**
+     * Method to display the main menu
+     */
+    
+    public void mainMenuDisplay()
+    {
+        // put your code here
+        
+    }
+}