class CheckInCheckOut
======================================================================================
 Main method pseudocode
	Create 4 dummy Customers
   	Create 5 dummy books
    	Create 5 dummy movies

	Get all customers login name and store them into string array user[].
	Get all books' titles and store them into string array bookName[].
	Get all movies' titles and store them into string array movieNamw[].
	
	Show "Welcome Message"

	do loop
		Prompt a login dialog box and ask for a user name
		Prompt a password dialog box and ask for password
	 	if (customers login and password is correct) then
   			Initialize menu content as "Check In","Check Out","Change Password" 
			and store values in string array menu[]
  			Initialize logout state as true.

			do loop
				Show menu dialog box and ask user to choose one option from the menu
				switch ( user choosed option )
					case "Check In"
						show dialog box and let user choose material type to check in (book or movie)
						If ( user choose book )
							Show all books' name and let user choose one which he/she wants to check in.
							find the book from this user's borrowed books list.
						else ( user choose movie )
							Show all movies' name and let user choose one which he/she wants to check in.
							find the movie from this user's borrowed movies list.
              					end if
						
						confirm user if he/she would like to check in this book or movie

						if ( user wants to continue )
							check in this material
						end if

					case "Check Out"
						show dialog box and let user choose material type to check in (book or movie)
						If ( user choose book )
							Show all books' name and let user choose one which he/she wants to check out.
							find the book from this user's borrowed books list.
						else ( user choose movie )
							Show all movies' name and let user choose one which he/she wants to check out.
							find the movie from this user's borrowed movies list.
              					end if
						
						confirm user if he/she would like to check in this book or movie

						if ( user wants to continue )
							check out this material
						end if

					case "Change password"
						Show a dialog box and ask user to give a new password.
						Confirm user to change password

						if ( user wants to continue )
							change password
						end if

					case "Logout"
						set logout state = true
				
				end switch

			end loop ( when logout state is true )
		end if

	show dialog ans ask user if wants to exit system
 	end loop ( when user choose exit from system )

 end of main


======================================================================================
exitSystemYesOrNo method pseudocode
	show dialog and ask user to choose one of the option ( " Exit system Yes/No" )
end of exitSystemYesOrNo


======================================================================================
continueYesOrNo method pseudocode
	show dialog and ask user to one of the option ( " Continue Yes/No " )
end of continueYesOrNo


======================================================================================
chooseMaterial method pseudocode
	Show dialog box with two options "Book " and "Movie" and ask user to choose one.
end of chooseMaterial 


======================================================================================
findMaterial method pseudocode
	for loop ( all material )
		if ( material's title is the same as the input )
    			return this material
	next material until last material
	
	does not find requested material and return a null value.
end of findMaterial