User`s manual

5 Calling Java from MATLAB
5-76
6. Display the Action Menu and Get the User’s Selection
Within a while loop, several disp statements display a menu of actions that
the user can perform on the phone book. Then, an
input statement requests the
user’s typed selection.
while 1
disp ' '
disp ' Phonebook Menu:'
disp ' '
disp ' 1. Look up a phone number'
disp ' 2. Add an entry to the phone book'
disp ' 3. Remove an entry from the phone book'
disp ' 4. Change the contents of an entry in the phone book'
disp ' 5. Display entire contents of the phone book'
disp ' 6. Exit this program'
disp ' '
s = input('Please type the number for a menu selection: ','s');
7. Invoke the Function to Perform A Phone Book Action
Still within the while loop, a switch statement provides a case to handle each
user selection. Each of the first five cases invokes the function to perform a
phone book action.
Case 1 prompts for a name that is a key to an entry. It calls
isempty to
determine whether the user has entered a name. If a name has not been
entered, it calls
disp to display an error message. If a name has been input, it
passes it to
pb_lookup. The pb_lookup routine looks up the entry and, if it finds
it, displays the entry contents.
switch s
case '1',
name = input('Enter the name to look up: ','s');
if isempty(name)
disp 'No name entered'
else
pb_lookup(pb_htable, name);
end;