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Set puzzle: Difference between revisions
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→{{header|REXX}}: added/changed whitespace and comments, split some compound clauses, used a template for the output section.
m (→{{header|REXX}}: changed wording in the REXX section header.) |
m (→{{header|REXX}}: added/changed whitespace and comments, split some compound clauses, used a template for the output section.) |
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The particular set of cards dealt (show below) used Regina 3.9.3 under a Windows/XP environment.
<lang rexx>/*REXX program finds and displays "sets" (solutions) for the SET puzzle (game).
parse arg game seed . /*get optional # cards to deal and seed*/
if game
if seed=='
call aGame 0 /*with tell=0: suppress the output. */
call aGame 1 /*with tell=1: display " " */
exit sets /*stick a fork in it, we're all done. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
aGame:
/* [↑] the GOOD var is the right #sets*/
do seed=seed until good==sets /*generate deals until good # of sets.*/
call random ,,seed /*repeatability for the RANDOM invokes.*/
call genFeatures /*generate various card game features. */
call genDeck /*
call dealer game /*deal a number of cards for the game. */
call findSets game%2 /*find # of sets from the dealt cards. */
end /*until*/ /* [↓] when leaving, SETS is right #.*/
return /*return to invoker of this subroutine.*/
/*──────────────────────────────────────────────────────────────────────────────────────*/
dealer: call sey 'dealing' game "cards:", , .
@.cards= deck._ /*add the card to the tableau. */
call sey right('card' cards, 30) " " @.cards /*display a card to terminal.*/
do j=1 for words(@.cards) /* [↓] define cells for cards. */
@.cards.j= word(@.cards, j) /*define a cell for a card. */
end /*j*/
return
/*──────────────────────────────────────────────────────────────────────────────────────*/
defFeatures: parse arg what,v; _= words(v) /*obtain what is to be defined. */
if _\==values then do; call sey 'error,' what "features ¬=" values, ., .
exit -1
end /* [↑] check for typos and/or errors. */
do k=1 for words(values) /*define all the possible values. */
call value what'.'k, word(values, k) /*define a card feature. */
end /*k*/
return
/*──────────────────────────────────────────────────────────────────────────────────────*/
findSets: parse arg n; call genPoss /*N: the number of sets to be found. */
call sey /*find any sets that were generated [↑]*/
do j=1 for p /*P: is the number of possible sets. */
do f=1 for features
do g=1 for groups; !!.j.f.g= word(!.j.f, g)
end /*g*/
end /*f*/
ok= 1 /*everything is peachy─kean (OK) so far*/
do g=1 for groups
_= !!.j.1.g /*build strings to hold possibilities. */
equ= 1 /* [↓] handles all the equal features.*/
do f=2 to features while equ; equ= equ & _==!!.j.f.g
end /*f*/
dif= 1
__= !!.j.1.g /* [↓] handles all unequal features.*/
do f=2 to features while \equ
dif= dif & (wordpos(!!.j.f.g, __)==0)
__= __ !!.j.f.g /*append to string for next test*/
end /*f*/
ok=ok & (equ | dif) /*now, see if all are equal or unequal.*/
end /*g*/
if \ok then iterate /*Is this set OK? Nope, then skip it.*/
sets= sets + 1 /*bump the number of the sets found. */
call sey right('set' sets": ", 15) !.j.1 sep !.j.2 sep !.j.3
end /*j*/
call sey sets 'sets found.', .
return
/*──────────────────────────────────────────────────────────────────────────────────────*/
genDeck: #= 0; ##= /*#: cards in deck; ##: shuffle aid.*/
do num=1 for values; xnum = word(numbers, num)
do col=1 for values; xcol = word(colors, col)
do sym=1 for values; xsym = word(symbols, sym)
do sha=1 for values; xsha = word(shadings, sha)
#= # + 1; ##= ## #;
deck.#= xnum xcol xsym xsha /*create a card. */
end /*sha*/
end /*num*/
end /*sym*/
end /*col*/
return /*#: the number of cards in the deck. */
/*──────────────────────────────────────────────────────────────────────────────────────*/
genFeatures: features= 3; groups= 4; values= 3 /*define # features, groups, values. */
numbers = 'one two three' ; call defFeatures 'number', numbers
colors = 'red green purple' ; call defFeatures 'color', colors
symbols = 'oval squiggle diamond' ; call defFeatures 'symbol', symbols
shadings= 'solid open striped' ; call defFeatures 'shading', shadings
return
/*──────────────────────────────────────────────────────────────────────────────────────*/
genPoss: p= 0; sets= 0; sep=' ───── ' /*define some REXX variables. */
!.=
do i=1 for game /* [↓] the IFs eliminate duplicates.*/
do j=i+1 to game
do k=j+1 to game
p= p + 1; !.p.1= @.i; !.p.2= @.j; !.p.3= @.k
end /*k*/
end /*j*/
end /*i*/ /* [↑] generate the permutation list. */
return
/*──────────────────────────────────────────────────────────────────────────────────────*/
sey: if \tell then return /*¬ tell? Then suppress the output. */
if arg(2)==. then say; say arg(1); if arg(3)==. then say; return</lang>
'''output''' when using the default input:
<pre>
Line 3,483 ⟶ 3,502:
4 sets found.
</pre>
<pre>
dealing 12 cards:
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