! cont-number-guess
!
! Copyright (C) 2004 Chris Double.
!
! Redistribution and use in source and binary forms, with or without
! modification, are permitted provided that the following conditions are met:
!
! 1. Redistributions of source code must retain the above copyright notice,
! this list of conditions and the following disclaimer.
!
! 2. Redistributions in binary form must reproduce the above copyright notice,
! this list of conditions and the following disclaimer in the documentation
! and/or other materials provided with the distribution.
!
! THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
! INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
! FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
! DEVELOPERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
! SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
! PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
! OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
! WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
! OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
! ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
!
! This example modifies the console based 'numbers-game' example
! in a very minimal way to demonstrate conversion of a console
! program to a web based application.
!
! All that was required was changing the input and output functions
! to use HTML. The remaining code was untouched.
!
! The result is not that pretty but it shows the basic idea.
USING: kernel math parser html html.elements io namespaces
math.parser random webapps.continuation ;
IN: webapps.numbers
: web-print ( str -- )
! Display the string in a web page.
[
swap dup
"" print
write
write
"Press to continue" write
] show 2drop ;
: read-number ( -- )
[
"" print
"Enter a number" write
] show [ "num" get ] bind string>number ;
: guess-banner
"I'm thinking of a number between 0 and 100." web-print ;
: guess-prompt ;
: too-high "Too high" web-print ;
: too-low "Too low" web-print ;
: correct "Correct - you win!" web-print ;
: inexact-guess ( actual guess -- )
< [ too-high ] [ too-low ] if ;
: judge-guess ( actual guess -- ? )
2dup = [
2drop correct f
] [
inexact-guess t
] if ;
: number-to-guess ( -- n ) 100 random ;
: numbers-game-loop ( actual -- )
dup guess-prompt read-number judge-guess [
numbers-game-loop
] [
drop
] if ;
: numbers-game number-to-guess numbers-game-loop ;
"numbers-game" [ numbers-game ] install-cont-responder