-) You did not deal with negative wages.
-) Your “Please enter employee’s name:” appears twice when I would like to remove an employee.
+) Other parts are well done!
+) Your interface is friendly
+) Your format of ShowEmployee and DoWeeklyPayroll is nice
+) Naming is good
+) Good you have proper comments
+) Good structured. It is nice for you to break the operations for different commands into different methods.
+) Good you have all fields private