aparler/RosettaCodeData
1
0
Fork 0
Code Issues 12 Pull requests 3 Projects Releases Packages Wiki Activity Actions

Just another update

Browse source
This commit is contained in:
Ingy döt Net 2015-02-20 00:35:01 -05:00
parent a25938f123
commit 00a190b0a6
6591 changed files with 94363 additions and 23227 deletions
Download patch file Download diff file Expand all files Collapse all files

17
Task/Menu/Prolog/menu-1.pro Normal file
View file

@ -0,0 +1,17 @@
rosetta_menu([], "") :- !. %% Incase of an empty list.
rosetta_menu(Items, SelectedItem) :-
repeat, %% Repeat until everything that follows is true.
display_menu(Items), %% IO
get_choice(Choice), %% IO
number(Choice), %% True if Choice is a number.
nth1(Choice, Items, SelectedItem), %% True if SelectedItem is the 1-based nth member of Items, (fails if Choice is out of range)
!.
display_menu(Items) :-
nl,
foreach( nth1(Index, Items, Item),
format('~w) ~s~n', [Index, Item]) ).
get_choice(Choice) :-
prompt1('Select a menu item by number:'),
read(Choice).