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f3f6e84ca6
* lisp/play/mpuz.el: Use lexical-binding. Remove redundant :group args. (mpuz-switch-to-window): Minor cleanup.
487 lines
15 KiB
EmacsLisp
487 lines
15 KiB
EmacsLisp
;;; mpuz.el --- multiplication puzzle for GNU Emacs -*- lexical-binding: t -*-
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;; Copyright (C) 1990, 2001-2021 Free Software Foundation, Inc.
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;; Author: Philippe Schnoebelen <phs@lsv.ens-cachan.fr>
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;; Overhauled: Daniel Pfeiffer <occitan@esperanto.org>
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;; Keywords: games
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; `M-x mpuz' generates a random multiplication puzzle. This is a
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;; multiplication example in which each digit has been consistently replaced
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;; with some letter. Your job is to reconstruct the original digits. Type
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;; `?' while the mode is active for detailed help.
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;;; Code:
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(defgroup mpuz nil
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"Multiplication puzzle."
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:prefix "mpuz-"
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:group 'games)
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(defcustom mpuz-silent 'error
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"Set this to nil if you want dings on inputs.
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The value t means never ding, and `error' means only ding on wrong input."
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:type '(choice (const :tag "No" nil)
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(const :tag "Yes" t)
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(const :tag "If correct" error)))
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(defcustom mpuz-solve-when-trivial t
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"Solve any row that can be trivially calculated from what you've found."
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:type 'boolean)
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(defcustom mpuz-allow-double-multiplicator nil
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"Allow 2nd factors like 33 or 77."
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:type 'boolean)
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(defface mpuz-unsolved
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'((default :weight bold)
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(((class color)) :foreground "red1"))
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"Face for letters to be solved.")
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(defface mpuz-solved
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'((default :weight bold)
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(((class color)) :foreground "green1"))
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"Face for solved digits.")
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(defface mpuz-trivial
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'((default :weight bold)
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(((class color)) :foreground "blue"))
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"Face for trivial digits solved for you.")
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(defface mpuz-text
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'((t :inherit variable-pitch))
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"Face for text on right.")
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;; Mpuz mode and keymaps
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;;----------------------
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(defcustom mpuz-mode-hook nil
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"Hook to run upon entry to mpuz."
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:type 'hook)
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(defvar mpuz-mode-map
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(let ((map (make-sparse-keymap)))
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(mapc (lambda (ch)
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(define-key map (char-to-string ch) 'mpuz-try-letter))
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"abcdefghijABCDEFGHIJ")
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(define-key map "\C-g" 'mpuz-offer-abort)
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(define-key map "?" 'describe-mode)
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map)
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"Local keymap to use in Mult Puzzle.")
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(define-derived-mode mpuz-mode fundamental-mode "Mult Puzzle"
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"Multiplication puzzle mode.
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You have to guess which letters stand for which digits in the
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multiplication displayed inside the `*Mult Puzzle*' buffer.
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You may enter a guess for a letter's value by typing first the letter,
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then the digit. Thus, to guess that A=3, type `A 3'.
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To leave the game to do other editing work, just switch buffers.
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Then you may resume the game with M-x mpuz.
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You may abort a game by typing \\<mpuz-mode-map>\\[mpuz-offer-abort]."
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(setq tab-width 30))
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;; Some variables for statistics
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;;------------------------------
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(defvar mpuz-nb-errors 0
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"Number of errors made in current game.")
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(defvar mpuz-nb-completed-games 0
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"Number of games completed.")
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(defvar mpuz-nb-cumulated-errors 0
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"Number of errors made in previous games.")
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;; Some variables for game tracking
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;;---------------------------------
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(defvar mpuz-in-progress nil
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"True if a game is currently in progress.")
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(defvar mpuz-found-digits (make-bool-vector 10 nil)
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"A vector recording which digits have been decrypted.")
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(defvar mpuz-trivial-digits (make-bool-vector 10 nil)
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"A vector recording which digits have been solved for you.")
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(defmacro mpuz-digit-solved-p (digit)
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`(or (aref mpuz-found-digits ,digit)
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(aref mpuz-trivial-digits ,digit)))
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;; A puzzle uses a permutation of [0..9] into itself.
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;; We use both the permutation and its inverse.
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;;---------------------------------------------------
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(defvar mpuz-digit-to-letter (make-vector 10 0)
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"A permutation from [0..9] to [0..9].")
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(defvar mpuz-letter-to-digit (make-vector 10 0)
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"The inverse of `mpuz-digit-to-letter'.")
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(defmacro mpuz-to-digit (letter)
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(list 'aref 'mpuz-letter-to-digit letter))
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(defmacro mpuz-to-letter (digit)
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(list 'aref 'mpuz-digit-to-letter digit))
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(defun mpuz-build-random-perm ()
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"Initialize puzzle coding with a random permutation."
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(let ((letters (list 0 1 2 3 4 5 6 7 8 9)) ; new cons cells, because of delq
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(index 10)
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elem)
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(while letters
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(setq elem (nth (random index) letters)
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letters (delq elem letters)
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index (1- index))
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(aset mpuz-digit-to-letter index elem)
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(aset mpuz-letter-to-digit elem index))))
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;; A puzzle also uses a board displaying a multiplication.
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;; Every digit appears in the board, crypted or not.
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;;------------------------------------------------------
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(defvar mpuz-board (make-vector 10 nil)
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"The board associates to any digit the list of squares where it appears.")
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(defun mpuz-put-number-on-board (number row &rest columns)
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"Put (last digit of) NUMBER on ROW and COLUMNS of the puzzle board."
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(let (digit)
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(dolist (column columns)
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(setq digit (% number 10)
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number (/ number 10))
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(aset mpuz-board digit `((,row . ,column) ,@(aref mpuz-board digit))))))
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(defun mpuz-check-all-solved (&optional row col)
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"Check whether all digits have been solved. Return t if yes."
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(catch 'solved
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(let (A B1 B2 C D E squares)
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(and mpuz-solve-when-trivial
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(not row)
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(while
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(cond ((or (and (setq B1 (or B1 (mpuz-check-all-solved 4 7))
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B2 (or B2 (mpuz-check-all-solved 4 9))
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E (or E (mpuz-check-all-solved 10))
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A (or A (mpuz-check-all-solved 2)))
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B1 B2)
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(and E (or A (and B1 B2))))
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(mpuz-solve)
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(mpuz-paint-board)
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(throw 'solved t))
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((and (setq D (or D (mpuz-check-all-solved 8))
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C (or C (mpuz-check-all-solved 6)))
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D (not E))
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(mpuz-solve 10))
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((and E (not (eq C D)))
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(mpuz-solve (if D 6 8)))
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((and A (not (eq B2 C)))
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(mpuz-solve (if C 4 6) (if C 9)))
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((and A (not (eq B1 D)))
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(mpuz-solve (if D 4 8) (if D 7)))
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((and (not A) (or (and B2 C) (and B1 D)))
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(mpuz-solve 2)))))
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(mpuz-paint-board)
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(mapc (lambda (digit)
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(and (not (mpuz-digit-solved-p digit)) ; unsolved
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(setq squares (aref mpuz-board digit))
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(if row
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(if col
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(member (cons row col) squares)
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(assq row squares))
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squares) ; and appearing in the puzzle!
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(throw 'solved nil)))
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[0 1 2 3 4 5 6 7 8 9]))
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t))
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;; To build a puzzle, we take two random numbers and multiply them.
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;; We also take a random permutation for encryption.
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;; The random numbers are only use to see which digit appears in which square
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;; of the board. Everything is stored in individual squares.
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;;---------------------------------------------------------------------------
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(defun mpuz-random-puzzle ()
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"Draw random values to be multiplied in a puzzle."
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(mpuz-build-random-perm)
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(fillarray mpuz-board nil) ; erase the board
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;; A,B,C,D & E, are the five rows of our multiplication.
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;; Choose random values, discarding cases with leading zeros in C or D.
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(let* ((A (if mpuz-allow-double-multiplicator (+ 112 (random 888))
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(+ 125 (random 875))))
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(min (1+ (/ 999 A)))
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(B1 (+ min (random (- 10 min))))
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B2 C D E)
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(while (if (= B1 (setq B2 (+ min (random (- 10 min)))))
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(not mpuz-allow-double-multiplicator)))
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(setq C (* A B2)
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D (* A B1)
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E (+ C (* D 10)))
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;; Individual digits are now put on their respective squares.
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;; [NB: A square is a pair (row . column) of the screen.]
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(mpuz-put-number-on-board A 2 9 7 5)
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(mpuz-put-number-on-board (+ (* B1 10) B2) 4 9 7)
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(mpuz-put-number-on-board C 6 9 7 5 3)
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(mpuz-put-number-on-board D 8 7 5 3 1)
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(mpuz-put-number-on-board E 10 9 7 5 3 1)))
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;; Display
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;;--------
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(defconst mpuz-framework
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"
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. . .
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Number of errors (this game): 0
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x . .
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-------
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. . . .
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Number of completed games: 0
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. . . .
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--------- Average number of errors: 0.00
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. . . . ."
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"The general picture of the puzzle screen, as a string.")
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(defun mpuz-create-buffer ()
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"Create (or recreate) the puzzle buffer. Return it."
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(let ((buf (get-buffer-create "*Mult Puzzle*"))
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(face '(face mpuz-text))
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buffer-read-only)
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(with-current-buffer buf
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(erase-buffer)
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(insert mpuz-framework)
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(set-text-properties 13 42 face)
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(set-text-properties 79 105 face)
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(set-text-properties 128 153 face)
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(mpuz-paint-board)
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(mpuz-paint-errors)
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(mpuz-paint-statistics))
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buf))
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(defun mpuz-paint-number (n &optional eol words)
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(end-of-line eol)
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(let (buffer-read-only)
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(delete-region (point)
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(progn (backward-word (or words 1)) (point)))
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(insert n)))
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(defun mpuz-paint-errors ()
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"Paint error count on the puzzle screen."
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(mpuz-switch-to-window)
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(goto-char (point-min))
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(forward-line 2)
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(mpuz-paint-number (prin1-to-string mpuz-nb-errors)))
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(defun mpuz-paint-statistics ()
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"Paint statistics about previous games on the puzzle screen."
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(goto-char (point-min))
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(forward-line 6)
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(mpuz-paint-number (prin1-to-string mpuz-nb-completed-games))
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(mpuz-paint-number
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(format "%.2f"
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(if (zerop mpuz-nb-completed-games)
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0
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(/ (+ 0.0 mpuz-nb-cumulated-errors)
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mpuz-nb-completed-games)))
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3 2))
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(defun mpuz-paint-board ()
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"Paint board situation on the puzzle screen."
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(mpuz-switch-to-window)
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(mapc 'mpuz-paint-digit [0 1 2 3 4 5 6 7 8 9])
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(goto-char (point-min)))
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(defun mpuz-paint-digit (digit)
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"Paint all occurrences of DIGIT on the puzzle board."
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(let ((char (if (mpuz-digit-solved-p digit)
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(+ digit ?0)
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(+ (mpuz-to-letter digit) ?A)))
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(face `(face
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,(cond ((aref mpuz-trivial-digits digit) 'mpuz-trivial)
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((aref mpuz-found-digits digit) 'mpuz-solved)
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('mpuz-unsolved))))
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buffer-read-only)
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(mapc (lambda (square)
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(goto-char (point-min))
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(forward-line (1- (car square))) ; line before column!
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(move-to-column (cdr square))
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(insert char)
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(set-text-properties (1- (point)) (point) face)
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(delete-char 1))
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(aref mpuz-board digit))))
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(defun mpuz-get-buffer ()
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"Get the puzzle buffer if it exists."
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(get-buffer "*Mult Puzzle*"))
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(defun mpuz-switch-to-window ()
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"Find or create the Mult-Puzzle buffer, and display it."
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(let ((buf (or (mpuz-get-buffer)
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(mpuz-create-buffer))))
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(switch-to-buffer buf)
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(setq buffer-read-only t)
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(mpuz-mode)))
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;; Game control
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;;-------------
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(defun mpuz-start-new-game ()
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"Start a new puzzle."
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(message "Here we go...")
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(setq mpuz-nb-errors 0
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mpuz-in-progress t)
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(fillarray mpuz-found-digits nil) ; initialize mpuz-found-digits
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(fillarray mpuz-trivial-digits nil)
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(mpuz-random-puzzle)
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(mpuz-switch-to-window)
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(mpuz-paint-board)
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(mpuz-paint-errors)
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(mpuz-ask-for-try))
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;;;###autoload
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(defun mpuz ()
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"Multiplication puzzle with GNU Emacs."
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;; Main entry point
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(interactive)
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(mpuz-switch-to-window)
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(if mpuz-in-progress
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(mpuz-offer-abort)
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(mpuz-start-new-game)))
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(defun mpuz-offer-abort ()
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"Ask if user wants to abort current puzzle."
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(interactive)
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(if (y-or-n-p "Abort game? ")
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(let ((buf (mpuz-get-buffer)))
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(message "Mult Puzzle aborted.")
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(setq mpuz-in-progress nil
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mpuz-nb-errors 0)
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(fillarray mpuz-board nil)
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(if buf (kill-buffer buf)))
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(mpuz-ask-for-try)))
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(defun mpuz-ask-for-try ()
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"Ask for user proposal in puzzle."
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(message "Your try?"))
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(defun mpuz-ding (error)
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"Dings, unless global variable `mpuz-silent' forbids it."
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(cond ((eq mpuz-silent t))
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((not mpuz-silent) (ding t))
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(error (ding t))))
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(defun mpuz-try-letter ()
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"Propose a digit for a letter in puzzle."
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(interactive)
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(if mpuz-in-progress
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(let (letter-char digit digit-char)
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(setq letter-char (upcase last-command-event)
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digit (mpuz-to-digit (- letter-char ?A)))
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(cond ((mpuz-digit-solved-p digit)
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(message "%c already solved." letter-char)
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(mpuz-ding t))
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((null (aref mpuz-board digit))
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(message "%c does not appear." letter-char)
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(mpuz-ding t))
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((progn (message "%c = " letter-char)
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;; <char> has been entered.
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;; Print "<char> =" and
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;; read <num> or = <num>
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(setq digit-char (read-char))
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(if (eq digit-char ?=)
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(setq digit-char (read-char)))
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(or (> digit-char ?9) (< digit-char ?0))) ; bad input
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(message "%c = %c" letter-char digit-char)
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(mpuz-ding t))
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(t
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(mpuz-try-proposal letter-char digit-char))))
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(if (y-or-n-p "Start a new game? ")
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(mpuz-start-new-game)
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(message "OK. I won't."))))
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(defun mpuz-try-proposal (letter-char digit-char)
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"Propose LETTER-CHAR as code for DIGIT-CHAR."
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(let* ((letter (- letter-char ?A))
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(digit (- digit-char ?0))
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(correct-digit (mpuz-to-digit letter)))
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(cond ((mpuz-digit-solved-p correct-digit)
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(message "%c has already been found." (+ correct-digit ?0)))
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((mpuz-digit-solved-p digit)
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(message "%c has already been placed." digit-char))
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((= digit correct-digit)
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(message "%c = %c correct!" letter-char digit-char)
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(mpuz-ding nil)
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(aset mpuz-found-digits digit t) ; Mark digit as solved
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(and (mpuz-check-all-solved)
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(mpuz-close-game)))
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(t ;;; incorrect guess
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(message "%c = %c incorrect!" letter-char digit-char)
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(mpuz-ding t)
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(setq mpuz-nb-errors (1+ mpuz-nb-errors))
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(mpuz-paint-errors)))))
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(defun mpuz-close-game ()
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"Housecleaning when puzzle has been solved."
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(setq mpuz-in-progress nil
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mpuz-nb-cumulated-errors (+ mpuz-nb-cumulated-errors mpuz-nb-errors)
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mpuz-nb-completed-games (1+ mpuz-nb-completed-games))
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(mpuz-paint-statistics)
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(let ((message (format "Puzzle solved with %d error%s. That's %s"
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mpuz-nb-errors
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(if (= mpuz-nb-errors 1) "" "s")
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(cond ((= mpuz-nb-errors 0) "perfect!")
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((= mpuz-nb-errors 1) "very good!")
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((= mpuz-nb-errors 2) "good.")
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((= mpuz-nb-errors 3) "not bad.")
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((= mpuz-nb-errors 4) "not too bad...")
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((< mpuz-nb-errors 10) "bad!")
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((< mpuz-nb-errors 15) "awful.")
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(t "not serious.")))))
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(message "%s" message)
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(sit-for 4)
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(if (y-or-n-p (concat message " Start a new game? "))
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(mpuz-start-new-game)
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(message "Good Bye!"))))
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(defun mpuz-solve (&optional row col)
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"Find solution for autosolving."
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(mapc (lambda (digit)
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(or (mpuz-digit-solved-p digit)
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(if row
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(not (if col
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(member (cons row col) (aref mpuz-board digit))
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(assq row (aref mpuz-board digit)))))
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(aset mpuz-trivial-digits digit t)))
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[0 1 2 3 4 5 6 7 8 9])
|
||
t)
|
||
|
||
(defun mpuz-show-solution (row)
|
||
"Display solution for debugging purposes."
|
||
(interactive "P")
|
||
(mpuz-switch-to-window)
|
||
(mpuz-solve (if row (* 2 (prefix-numeric-value row))))
|
||
(mpuz-paint-board)
|
||
(if (mpuz-check-all-solved)
|
||
(mpuz-close-game)))
|
||
|
||
(provide 'mpuz)
|
||
|
||
;;; mpuz.el ends here
|