Go Fish

Go Fish
You are encouraged to solve this task according to the task description, using any language you may know.

Write a program to let the user play Go Fish against a computer opponent. Use the following rules:

• Each player is dealt nine cards to start with.
• On their turn, a player asks their opponent for a given rank (such as threes or kings). A player must already have at least one card of a given rank to ask for more.
  • If the opponent has any cards of the named rank, they must hand over all such cards, and the requester can ask again.
  • If the opponent has no cards of the named rank, the requester draws a card and ends their turn.
• A book is a collection of every card of a given rank. Whenever a player completes a book, they may remove it from their hand.
• If at any time a player's hand is empty, they may immediately draw a new card, so long as any new cards remain in the deck.
• The game ends when every book is complete. The player with the most books wins.

The game's AI need not be terribly smart, but it should use at least some strategy. That is, it shouldn't choose legal moves entirely at random.

You may want to use code from Playing Cards.

Related tasks:

• Playing cards
• Card shuffles
• Deal cards_for_FreeCell
• War Card_Game
• Poker hand_analyser

Aime

See Go Fish/Aime

AutoHotkey

See Go Fish/AutoHotkey

C

See Go Fish/C

C++

See Go Fish/C++

D

See Go Fish/D

Erlang

See Go Fish/Erlang

FreeBASIC

' Go Fish ~ ¡Pesca!

Const cartas = "A234567890JQK"

Declare Sub Reparto_Cartas
Declare Sub Pescar_Carta_Jug
Declare Sub Pescar_Carta_CPU
Declare Sub Comprobar_Libro_Jug
Declare Sub Comprobar_Libro_CPU
Declare Sub Comprobar_Fin_Partida
Declare Sub Intro

Dim Shared As Integer play(13), compu(13), deck(13), guess(13), poss(13), asked(13)
Dim Shared As String nombre, Snombre, CartaPedida
Dim Shared puntos(2) As Byte = {0,0}
Dim Shared As Integer remca = 4*Len(cartas)
Dim Shared As Integer i, k, j, cn
For i = 1 To 13
    deck(i) = 4
Next i
For i = 1 To 9
    Reparto_Cartas
    deck(k) -= 1
    compu(k) += 1
    Reparto_Cartas
    deck(k) -= 1
    play(k) += 1
Next i
Dim As Integer v, po

Sub Reparto_Cartas
    remca -= 1
    Dim As Integer sc = remca * Rnd + 1
    For k = 1 To 13
        sc -= deck(k)
        If sc <= 0 Then Return
    Next k
End Sub

Sub Pescar_Carta_Jug
    Reparto_Cartas
    Print " " &Mid(cartas,k,1) &"."
    deck(k) -= 1
    play(k) += 1
End Sub

Sub Pescar_Carta_CPU
    Reparto_Cartas
    Print "a carta."
    deck(k) -= 1
    compu(k) += 1
End Sub

Sub Comprobar_Libro_Jug
    For i = 1 To 13
        If play(i) <> 4 Then
        Else
            Color 11: Print Snombre &" completa el libro de " &Mid(cartas,i,1) &"'s.": Color 7
            play(i) = 0
            puntos(0) += 1
        End If
    Next i
End Sub

Sub Comprobar_Libro_CPU
    For i = 1 To 13
        If compu(i) <> 4 Then
        Else
            Color 11: Print Snombre &" completa el libro de " &Mid(cartas,i,1) &"'s.": Color 7
            compu(i) = 0
            puntos(1) += 1
        End If
    Next i
End Sub

Sub Comprobar_Fin_Partida
    Dim As Integer np = 0, nc = 0
    For i = 1 To 13
        np += play(i)
        nc += compu(i)
    Next i
    If remca = 0 Or np = 0 Or nc = 0 Then         
        Color 15: Print
        Print "*** ­FIN de la partida! ***"
        Print
        If puntos(0) < puntos(1) Then 
            Print "La CPU ha ganado."
        Elseif puntos(0) > puntos(1) Then 
            Print nombre &" ha ganado." 
        Else 
            Print "­Es un empate!"
        End If
        Sleep: End
    End If
End Sub

Sub Intro
    Color 15 
    Print "                __ _     _      "
    Print "  __ _  ___    / _(_)___| |__   "
    Print " /  ` |/ _ \  | |_| / __| '_ \  "
    Print "| (_) | (_) | |  _| \__ \ | | | "
    Print " \__, |\___/  |_| |_|___/_| |_| "
    Print " |___/                          "
    Print "                                "
    Color 14: Locate 10, 2: Input "Como te llamas: ", nombre
End Sub

'--- Programa Principal ---
Cls
Randomize Timer
Intro
Do
    Dim As boolean MuestraMano = false
    While MuestraMano = false
        Color 15: Print Chr(10) &"Puntos >> " &nombre &": "; puntos(0); "  CPU: "; puntos(1)
        Color 13: Print Chr(10) &space(10) &remca &" cartas restantes"
        Color 14: Print Chr(10) &"Tu mano: ";
        For i = 1 To 13
            If Not play(i) Then 
                For j = 1 To play(i)
                    Print Mid(cartas,i,1); " ";
                Next j
            End If
        Next i
        Print
        
        Dim As boolean PideCarta = false
        While PideCarta = false
            Comprobar_Fin_Partida
            Snombre = nombre
            Color 7: Print
            Input "¨Que carta pides... "; CartaPedida
            Print
            If CartaPedida <> "" Then cn = Instr(cartas, Ucase(CartaPedida)): PideCarta = true
            If cn = 0 Then 
                Print "Lo siento, no es una opción valida.": PideCarta = false
                Elseif play(cn) = 0 Then Color 12: Print "­No tienes esa carta!": Color 7: PideCarta = false
            End If
        Wend
        
        guess(cn) = 1
        If compu(cn) = 0 Then 
            Print Snombre &", ";
            Color 15: Print "­ve a pescar!"
            Color 7: Print Snombre &" pesca un";: Pescar_Carta_Jug
            Comprobar_Libro_Jug
            MuestraMano = true
        Else
            v = compu(cn)
            compu(cn) = 0
            play(cn) += v
            Print Snombre &" consigue " &v &" carta(s) mas."
            Comprobar_Libro_Jug
            MuestraMano = false
        End If
    Wend

    Snombre = "CPU"
    For i = 1 To 13
        asked(i) = 0
    Next i
    Dim As boolean Turno_CPU_2 = false
    While Turno_CPU_2 = false
        Comprobar_Fin_Partida
        po = 0
        For i = 1 To 13
            If (compu(i) > 0) And (guess(i) > 0) Then poss(i) = 1: po += 1
        Next i
        If po = 0 Then 
            Do
                k = (Rnd*12)+1
            Loop While compu(k) = 0 Or asked(k)
        Else
            Do
                k = (Rnd*12)+1
            Loop While poss(k) = 0
            guess(k) = 0
            asked(k) = 1
        End If

        Print: Print Snombre &" quiere tus " &Mid(cartas,k,1) &"'s."
        asked(k) = 1
        If play(k) = 0 Then 
            Print Snombre &", ";
            Color 15: Print "­ve a pescar!"
            Color 7:Print Snombre &" pesca un";: Pescar_Carta_CPU
            Comprobar_Libro_CPU
            Turno_CPU_2 = true
        Else
            v = play(k)
            play(k) = 0
            compu(k) += v
            Print Snombre &" consigue " &v &" carta(s) mas."
            Comprobar_Libro_CPU
            Turno_CPU_2 = false
        End If
    Wend 
Loop
End

FutureBasic

Translated from FreeBasic May 5, 2024 Rich Love Fixed intermittent hang Also, now using && and || to be compatible with later versions of FutureBasic. ( replaces AND and OR )

/*

Go Fish
-- Rich Love --

FutureBasic app For Macintosh
Get the latest FutureBasic here 
http://www.brilorsoftware.com/fb/pages/home.html

*/


_window = 1
begin enum 1
  _scrollView
  _textView
end enum

override _forLoopsAlwaysExecuteAtLeastOnce = _true

begin globals

str255 cards
cards = "A234567890JQK"
short play(13), Computer(13), deck(13), guess(13), poss(13), asked(13)
str255 YourName, Someone
//bool gNeedToClearScreen
short Points(2) : Points(0) = 0 : Points(1) = 0
short i, k, j, CardNumber
short RemainingCards

end globals


local fn CheckForFaceCard(TheCard as short) as str255
  str255 WantsCard
  WantsCard = str$(TheCard)
  
  if TheCard = 0 then WantsCard = "10"
  if TheCard = 11 then WantsCard = "jack"
  if TheCard = 12 then WantsCard = "Queen"
  if TheCard = 13 then WantsCard = "King"
  if TheCard = 1 then WantsCard = "Ace"
end fn = WantsCard


void local fn PrintViewScrollToBottom( printView as ViewRef )
  BeginCCode
            NSScrollView *scrollView = [printView enclosingScrollView];
            NSClipView *clipView = [scrollView contentView];
            [clipView scrollToPoint:NSMakePoint(0,printView.frame.size.height-scrollView.contentSize.height + 20)];
            [scrollView reflectScrolledClipView:clipView];
      EndC
end fn


void local fn DealCards
  
  RemainingCards -= 1
  short sc
  sc = rnd(RemainingCards) + 1  // 5/2/24  Rich added + 1
  
  For k = 1 To 13
    sc -= deck(k)
    If sc <= 0 Then exit fn
  Next k
  
End fn

void local fn youGoFishing
  
  fn DealCards
  
  str255 WantsCard
  WantsCard = fn CheckForFaceCard(k)
  
  if WantsCard = "0" then WantsCard = "10"
  
  Print " "  + WantsCard + "."
  deck(k) -= 1
  play(k) += 1
  
End fn


void local fn cpuGoFishing
  
  fn DealCards
  Print " a card from the deck."
  if k > 13 then k = 13
  deck(k) -= 1
  Computer(k) += 1
  
End fn


void local fn CheckForCompletedBook
  
  For i = 1 To 13
    If play(i) <> 4
    Else
      text ,,fn colorcyan
      
      str255 WantsCard
      WantsCard = Mid$(cards,i,1)
      
      if WantsCard = "j" || WantsCard = "J" then WantsCard = "Jack"
      if WantsCard = "q" || WantsCard = "Q" then WantsCard = "Queen"
      if WantsCard = "k" || WantsCard = "K" then WantsCard = "King"
      if WantsCard = "a" || WantsCard = "A" then WantsCard = "Ace"
      if WantsCard = "0" then WantsCard = "10"
      
      Print YourName + " completed the book of " + WantsCard + "'s."
      text ,,fn colorWhite
      play(i) = 0
      Points(0) += 1
      fn PrintViewScrollToBottom( fn WindowPrintView(1))
    End If
  Next i
  
End fn

local fn CheckCPUForCompletedBook
  
  For i = 1 To 13
    
    If Computer(i) <> 4
    Else
      text ,,fn colorCyan
      str255 WantsCard
      WantsCard = Mid$(cards,i,1)
      
      if WantsCard = "j" || WantsCard = "J" then WantsCard = "Jack"
      if WantsCard = "q" || WantsCard = "Q" then WantsCard = "Queen"
      if WantsCard = "k" || WantsCard = "K" then WantsCard = "King"
      if WantsCard = "a" || WantsCard = "A" then WantsCard = "Ace"
      if WantsCard = "0" then WantsCard = "10"
      
      Print "CPU completed the book of " + WantsCard + "'s."
      
      text ,,fn colorWhite
      Computer(i) = 0
      Points(1) += 1
      fn PrintViewScrollToBottom( fn WindowPrintView(1))
    End If
  Next i
  
End fn


local fn InitCards
  
  cards = "A234567890JQK"
  RemainingCards = 4 * len$(cards)  // the length of cards is 13. There are 4 suits of cards. so RemainingCards is 52
  i = 0:k = 0:j = 0:CardNumber = 0
  
  For i = 0 to 1
    Points(i) = 0
  next i
  
  For i = 1 TO 13 // Reset each element to 0
    play(i) = 0
    Computer(i) = 0
    deck(i) = 0
    guess(i) = 0
    poss(i) = 0
    asked(i) = 0
    
  NEXT i
  
  
  For i = 1 To 13
    deck(i) = 4
  Next i
  For i = 1 To 9
    fn DealCards
    deck(k) -= 1
    Computer(k) += 1
    fn DealCards
    deck(k) -= 1
    play(k) += 1
  Next i
  
  fn CheckForCompletedBook  // Rich added 5/1/24
  fn CheckCPUForCompletedBook  // Rich added 5/5/24
end fn


local fn QuitOrPlayAlert(GameResult as CFStringRef)
  
  alert -2,,GameResult,@"Game Over",@"Quit;Play Again"
  AlertButtonSetKeyEquivalent( 2, 2, @"\e" )
  short result
  result = alert 2
  if ( result != NSAlertSecondButtonReturn ) then end
  
end fn

local fn QuitOrResumeAlert(GameResult as CFStringRef)
  
  alert -3,,GameResult,@"Quit the game?",@"Quit;Resume game"
  AlertButtonSetKeyEquivalent( 3, 2, @"\e" )
  short result
  result = alert 3
  if ( result != NSAlertSecondButtonReturn ) then end
  
end fn

local fn CheckForEndGame as boolean
  
  bool PlayAgain = _False
  short np = 0, nc = 0
  For i = 1 To 13
    np += play(i)
    nc += Computer(i)
  Next i
  
  If RemainingCards = 0 || np = 0 || nc = 0
    
    text ,,fn colorRed
    Print "*** Game Over! ***"
    Print
    If Points(0) < Points(1)
      Print "The CPU has won."
      print:print
      fn QuitOrPlayAlert(@"the CPU won!")
      PlayAgain = _True
    Else if Points(0) > Points(1)
      Print YourName + " has won."
      print:print
      fn QuitOrPlayAlert(@"You Won!")
      PlayAgain = _True
    Else
      Print "­It's a tie!"
      fn QuitOrPlayAlert(@"It's a tie!.")
      PlayAgain = _True
    End If
    fn PrintViewScrollToBottom( fn WindowPrintView(1) )
    
  End If
  
  PlayAgain = _True
  
End If

End fn = PlayAgain


void local fn Intro
  
  text ,,fn colorGreen
  Print "                __ _     _      "
  Print "  __ _  ___    / _(_)___| |__   "
  Print " /  ` |/ _ \  | |_| / __| //_ \  "
  Print "| (_) | (_) | |  _| \__ \ | | | "
  Print " \__, |\___/  |_| |_|___/_| |_| "
  Print " |___/                          "
  Print ""
  
  text ,,fn colorCyan
  print %(301,90),"( x to exit the game )"
  text ,,fn colorWhite
  
  print " Go Fish Rules:"
  print
  print " You are playing against the CPU."
  print " You are dealt nine cards to start with."
  print " The remaining cards are placed face down in the center of the table"
  print " to form the draw pile (the fish pond)."
  print " On your turn, you ask the CPU For a card."
  print " You must already have at least one card of a given rank to ask For more."
  print " (A rank is one || more of any card.)"
  print " If the CPU has any cards of the named rank, it must hand over all such cards,"
  print " and you can then ask again."
  print " If the CPU has no cards of the named rank, a card will be drawn from the pile,"
  print " and placed in your hand, which then ends your turn."
  print " A book is a collection of four cards in a given rank."
  print " Whenever you complete a book, it will be removed from your hand."
  print " If at any time, your hand is empty, a new card will be drawn from the pile."
  print " The game ends when every book is complete,"
  print " || there are no more cards left in the pile."
  print " The player with the most books wins."
  
  
  CFStringRef UserInput
  "InputYourName"
  UserInput = input % (300, 70), @"What's your name?: "
  if ( UserInput == NULL ) then "InputYourName" // Rich added this 5/1/24
  fn CFStringGetPascalString (UserInput, @YourName, 256, _kCFStringEncodingMacRoman)
  cls
  
  if YourName = "X" || YourName = "x" || YourName = chr$(127) then fn QuitOrResumeAlert(@"EXIT")
  
End fn


local fn WhatCardInputHeight as short
  
  CGRect mainScreenFrame = fn ScreenMainFrame
  float InputHeight = int(mainScreenFrame.size.height - 120)
  
end fn = InputHeight


local fn BuildWindow
  
  // ---> Get the size of the Main Screen. <---
  CGRect mainScreenFrame = fn ScreenMainFrame
  float msh = mainScreenFrame.size.height
  CGRect r = fn CGRectMake( 0, 0, 600, int(msh) - 110)
  
  window 1, @"Go Fish", r
  windowcenter(1)
  WindowSetBackgroundColor(1,fn ColorBlack)
  
end fn

//--- Start ---

fn BuildWindow

fn Intro

fn InitCards

str255 AddTheS
bool RequestCard = _false
short v = 0
short po = 0
boolean ShowHand = _false
str255 WantsCard

"Main"

ShowHand = _false

str255 RequestedCard

While ShowHand = _false
  text ,,fn colorGreen
  Print Chr$(10)  + "Points >> ";
  text ,,fn colorYellow
  print YourName + ": ";
  text ,,fn colorGreen
  print Points(0);
  text ,,fn colorOrange
  print "  CPU: ";
  text ,,fn colorGreen
  print Points(1)
  text ,,fn colorWhite
  Print Chr$(10) + "          " + str$(RemainingCards) + " remaining cards"
  text ,,fn colorWhite
  
  
  /*
  // Uncomment this to see the CPUs cards For testing
  Print Chr$(10) + "CPU Cards:  ";
  For i = 1 To 13
  if Computer(i) <> 0
  For j = 1 To Computer(i)
  if Mid$(cards,i,1) = "0"
  Print @"10"; " ";
  else
  Print Mid$(cards,i,1); " ";
  end if
  Next j
  End If
  Next i
  Print
  fn PrintViewScrollToBottom( fn WindowPrintView(1))
  */
  
  
  Print Chr$(10) + "Your Cards: ";
  For i = 1 To 13
    if play(i) <> 0
      For j = 1 To play(i)
        if Mid$(cards,i,1) = "0"
          Print @"10"; " ";
        else
          Print Mid$(cards,i,1); " ";
        end if
      Next j
    End If
  Next i
  Print
  fn PrintViewScrollToBottom( fn WindowPrintView(1))
  
  RequestCard = _false
  
  While RequestCard = _false
    if fn CheckForEndGame = _True then cls:fn InitCards:goto "Loop"
    
    Someone = YourName
    
    CFStringRef UserInput = 0
    "InputCard"
    UserInput = input % (20, fn WhatCardInputHeight),@"What card do you want? "
    if ( UserInput == NULL ) then "InputCard" // Rich added this 5/1/24
    fn CFStringGetPascalString (UserInput, @RequestedCard, 256, _kCFStringEncodingMacRoman)
    if RequestedCard = "10" then RequestedCard = "0"// card zero is a 10
    text ,,fn ColorYellow
    Print
    
    WantsCard = RequestedCard
    
    if WantsCard = "j" || WantsCard = "J" then WantsCard = "Jack"
    if WantsCard = "q" || WantsCard = "Q" then WantsCard = "Queen"
    if WantsCard = "k" || WantsCard = "K" then WantsCard = "King"
    if WantsCard = "a" || WantsCard = "A" then WantsCard = "Ace"
    if WantsCard = "0" then WantsCard = "10"
    
    print "-------------------------------------"
    print
    str255 AorAn
    AorAn  = "a"
    if WantsCard = "Ace" then AorAn = "an"
    print YourName + " asked For " + AorAn + " " + WantsCard
    print
    text ,,fn ColorWhite
    
    fn PrintViewScrollToBottom( fn WindowPrintView(1))
    
    if RequestedCard = "X" || RequestedCard = "x" then fn QuitOrResumeAlert(@"EXIT")
    
    If RequestedCard <> "" Then CardNumber = Instr$(1,cards, Ucase$(RequestedCard)): RequestCard = _true
    
    If CardNumber = 0
      text,,fn ColorRed
      Print "Sorry, that is not a valid card.": RequestCard = _false
      print
      fn PrintViewScrollToBottom( fn WindowPrintView(1))
    Else if play(CardNumber) = 0 Then text ,,fn colorRed: Print "You don//t have that card!": text ,,fn colorRed: RequestCard = _false
      fn PrintViewScrollToBottom( fn WindowPrintView(1))
      text,,fn ColorWhite
      
    End If
    
  Wend
  
  guess(CardNumber) = 1
  
  If Computer(CardNumber) = 0
    Print Someone + ",";
    text ,,fn colorRed
    Print " Go fish!"
    text ,,fn colorWhite
    Print Someone + " got a";: fn youGoFishing
    print
    fn CheckForCompletedBook
    ShowHand = _true
  Else
    v = Computer(CardNumber)
    Computer(CardNumber) = 0
    play(CardNumber) += v
    if v > 1 then AddTheS = "s" else AddTheS = ""
    Print Someone + " got" + str$(v) + " card" + AddTheS
    fn CheckForCompletedBook
    fn PrintViewScrollToBottom( fn WindowPrintView(1))
    ShowHand = _false
  End If
  
Wend



Someone = "CPU"
For i = 1 To 13
  asked(i) = 0
Next i

bool CPUsTurn = _false

While CPUsTurn = _false
  if fn CheckForEndGame = _True then cls:fn InitCards:goto "Loop"
  
  po = 0
  For i = 1 To 13
    If (Computer(i) > 0) && (guess(i) > 0) Then poss(i) = 1: po += 1
  Next i
  
  short whilecounter
  WhileCounter = 0
  
  
  If po = 0
    // this k is the go fish card.
    
    k = rnd(12) +1
    while Computer(k) = 0 || asked(k)
      whilecounter ++
      k = rnd(12) +1
      if WhileCounter > 100 then k = 0: exit while  //5/5/24  Rich added this to prevent hangs
    wend
    
  Else
    
    k = rnd(12) + 1
    while poss(k) = 0
      k = rnd(12) + 1
      if WhileCounter > 100 then k = 0: exit while //5/5/24  Rich added this to prevent hangs
    wend
    
    guess(k) = 0
    asked(k) = 1
    
  end if
  
  
  if k = 0 then "Loop"  //5/5/24  Rich added this to prevent hangs
  
  WantsCard = fn CheckForFaceCard(k)
  
  if WantsCard = "j" || WantsCard = "J" then WantsCard = "Jack"
  if WantsCard = "q" || WantsCard = "Q" then WantsCard = "Queen"
  if WantsCard = "k" || WantsCard = "K" then WantsCard = "King"
  if WantsCard = "a" || WantsCard = "A" then WantsCard = "Ace"
  if WantsCard = "0" then WantsCard = "10"
  
  text ,,fn ColorOrange
  
  print "-------------------------------------"
  
  
  
  Print:Print Someone + " wants your " + wantsCard + "'s."
  print
  
  text ,,fn ColorWhite
  
  asked(k) = 1
  
  
  If play(k) = 0
    Print Someone + ", ";
    text ,,fn colorRed: Print "go fish!"
    text ,,fn colorWhite:Print Someone + " got";: fn cpuGoFishing
    
    fn CheckCPUForCompletedBook
    CPUsTurn = _true
    
  Else
    
    v = play(k)
    play(k) = 0
    Computer(k) += v
    if v > 1 then AddTheS = "s" else AddTheS = ""
    Print Someone + " got" + str$(v) + " card" + AddTheS
    fn CheckCPUForCompletedBook
    CPUsTurn = _false
  End If
  
  
Wend

"Loop"
goto "Main"

handleevents

Go

See Go Fish/Go

Haskell

See Go Fish/Haskell

Icon and Unicon

See Go Fish/Unicon

J

See Go Fish/J

Java

See Go Fish/Java

Julia

see Go Fish/Julia

Kotlin

See Go Fish/Kotlin

Lua

See Go Fish/Lua

Locomotive Basic

See Go Fish/Locomotive Basic

Mathematica / Wolfram Language

See Go Fish/Mathematica

Nim

See Go Fish/Nim

OCaml

See Go Fish/OCaml

Perl

#!/usr/bin/perl

use strict; # https://rosettacode.org/wiki/Go_Fish
use warnings;
use List::Util qw( first shuffle );

my $pat = qr/[atjqk2-9]/; # ranks
my $deck = join '', shuffle map { my $rank = $_; map "$rank$_", qw( S H C D ) }
  qw( a t j q k ), 2 .. 9;

my $mebooks = my $youbooks = 0;

my $me = substr $deck, 0, 2 * 9, '';
my $mepicks = join '', $me =~ /$pat/g;
arrange($me);
$mebooks++ while $me =~ s/($pat).\1.\1.\1.//;
my $you = substr $deck, 0, 2 * 9, '';
my $youpicks = join '', $you =~ /$pat/g;
arrange($you);
$youbooks++ while $you =~ s/($pat).\1.\1.\1.//;

while( $mebooks + $youbooks < 13 )
  {
  play( \$you, \$youbooks, \$youpicks, \$me, \$mebooks, 1 );
  $mebooks + $youbooks == 13 and last;
  play( \$me, \$mebooks, \$mepicks, \$you, \$youbooks, 0 );
  }
print "me $mebooks you $youbooks\n";

sub arrange { $_[0] = join '', sort $_[0] =~ /../g }

sub human
  {
  my $have = shift =~ s/($pat).\K(?!\1)/ /gr;
  local $| = 1;
  my $pick;
  do
    {
    print "You have $have, enter request: ";
    ($pick) = lc(<STDIN>) =~ /$pat/g;
    } until $pick and $have =~ /$pick/;
  return $pick;
  }

sub play
  {
  my ($me, $mb, $lastpicks, $you, $yb, $human) = @_;
  my $more = 1;
  while( arrange( $$me ), $more and $$mb + $$yb < 13 )
    {
#   use Data::Dump 'dd'; dd \@_, "deck $deck";
    if( $$me =~ s/($pat).\1.\1.\1.// )
      {
      print "book of $&\n";
      $$mb++;
      }
    elsif( $$me )
      {
      my $pick = $human ? do { human($$me) } : do
        {
        my %picks;
        $picks{$_}++ for my @picks = $$me =~ /$pat/g;
        my $pick = first { $picks{$_} } split(//, $$lastpicks), shuffle @picks;
        print "pick $pick\n";
        $$lastpicks =~ s/$pick//g;
        $$lastpicks .= $pick;
        $pick;
        };
      if( $$you =~ s/(?:$pick.)+// )
        {
        $$me .= $&;
        }
      else
        {
        print "GO FISH !!\n";
        $$me .= substr $deck, 0, 2, '';
        $more = 0;
        }
      }
    elsif( $deck )
      {
      $$me .= substr $deck, 0, 2, '';
      }
    else
      {
      $more = 0;
      }
    }
  arrange( $$me );
  }

Phix

See Go Fish/Phix

PicoLisp

See Go Fish/PicoLisp

PowerShell

See Go Fish/PowerShell

PureBasic

See Go Fish/PureBasic

Python

See Go Fish/Python

Raku

(formerly Perl 6) See Go Fish/Raku

Red

Red [
    Title:  "Go Fish"
    Author: "gltewalt"
]
 
chand: []   ;-- c and p = computer and player
cguesses: []
phand: []
cbooks: 0
pbooks: 0
gf: {
    ***************
    *   GO FISH   *
    ***************
}
pip: ["a" "2" "3" "4" "5" "6" "7" "8" "9" "10" "j" "q" "k"] ;-- suits are not relevant
pile: []    ;-- where discarded cards go
 
;---------------------
;  Helper functions  -                                           
;---------------------
 
clear-screen: does [
    "clears the console"
    call/console either system/platform = 'Linux ["clear"]["cls"]
]
 
clear-and-show: func [duration str][
    {
        Poor persons animation. 
        Blips message to screen after a pause of duration length.

    }
    clear-screen
    print str 
    wait duration 
    clear-screen
]
 
deal-cards: func [num hand][ 
    loop num [
        append hand rejoin [trim/all form take deck]
    ] 
]
 
find-in: func [blk str][
    "Finds a string value in a block. Series in series."
    foreach i blk [if find i str [return i]]
]
 
go-fish: func [num hand][
    either not empty? deck [
        deal-cards num hand
    ][
        append hand rejoin [trim/all form take pile]    ;-- take from pile if deck is empty
    ]
]
 
guess-from: func [hand guessed][
    {
        Randomly picks from hand minus guessed.

        Simulates a person asking for different cards on
        their next turn if their previous guess resulted
        in a Go Fish.
    }
    random/seed now/time
    either any [empty? guessed empty? exclude hand guessed][
        random/only hand 
    ][
        random/only exclude hand guessed
    ]
]
 
make-deck: function [] [
    "make-deck and shuffle from https://rosettacode.org/wiki/Playing_cards#Red"
     new-deck: make block! 52
     foreach p pip [loop 4 [append/only new-deck p]]
     return new-deck
]

show-cards: does [
    clear-and-show 0 ""
    print [newline "Player cards:" newline sort phand newline]
    print ["Computer books:" cbooks]
    print ["Player books:" pbooks newline]
]

shuffle: function [deck [block!]] [deck: random deck]
 
;------------- end of helper functions -----------------

check-for-books: func [
    {
        Checks for a book in a players hand.
        Increments the players book score, and
        discards the book from the players hand
    }
    hand "from or to hand"
    kind "rank of cards"
    /local 
        c "collected"
][
    c: collect [
        forall hand [keep find hand/1 kind]
    ]
    remove-each i c [none = i] 
    if 4 = length? c [
        either hand = phand [pbooks: pbooks + 1][cbooks: cbooks + 1]
        remove-each i hand [if find/only c i [i]]   ;-- remove book from hand
        forall c [append pile c/1]  ;-- append discarded book to the pile
    ]
]
 
transfer-cards: func [
    "Transfers cards from player to player"
    fhand "from hand"
    thand "to hand"
    kind "rank of cards"
    /local 
        c "collected"
][
    c: collect [forall fhand [keep find fhand/1 kind]]
    remove-each i c [none = i]  ;-- remove none values from collected
    forall c [append thand c/1] ;-- append remaining values to "to hand"
    remove-each i fhand [if find/only c i [i]] ;-- remove those values from "from hand"
]
 
computer-turn: func [
    fhand "from hand"
    thand "to hand"
    kind  "rank of cards"
    /local 
        a 
][
    a: ask rejoin ["Do you have any " kind " s? "]
    if a = "x" [halt]
    either any [a = "y" a = "yes"][
        check-for-books thand kind
        transfer-cards fhand thand kind
        show-cards
        computer-turn fhand thand guess-from thand cguesses
    ][  
        clear-and-show 0.4 gf 
        go-fish 1 thand   
        append cguesses kind 
    ]
]
 
player-turn: func [
    fhand "from hand"
    thand "to hand"
    kind  "rank of cards"
    /local
        p 
][
    if empty? fhand [go-fish 3 fhand]

    if none? find-in thand kind [   ;-- player has to hold rank asked for
        clear-and-show 1.0 
        "You have to have that rank in your hand to ask for it.^/Computers turn..."
        exit
    ]

    either find-in fhand kind [
        check-for-books thand kind
        transfer-cards fhand thand kind 
        show-cards
        if find-in thand kind [ 
            p: ask "Your guess: "
            either p = "x" [halt][player-turn fhand thand p]
            check-for-books thand p 
        ]
    ][
        clear-and-show 0.4 gf 
        go-fish 1 thand 
    ]
]
 
game-round: has [c p][
    print {
          -------------------
          -  COMPUTER TURN  -
          -------------------
          }
 
    if empty? chand [  ; computer has no more cards? fish 3 cards.
        go-fish 3 chand
        show-cards
    ]
    computer-turn phand chand c: guess-from chand cguesses
    check-for-books chand c
    show-cards
 
    print {
          -------------------
          -   PLAYER TURN   -
          -------------------
          }

    if empty? phand [   ;-- player has no more cards? fish 3 cards.
        go-fish 3 phand
        show-cards
    ]
    p: ask "Your guess: "
    either p = "x" [halt][player-turn chand phand find-in phand p]
    check-for-books phand p 
    show-cards
]
 
main: does [
    deck: shuffle make-deck
    deal-cards 9 chand
    deal-cards 9 phand
    show-cards
    while [cbooks + pbooks < 13][
        game-round  
    ]
    clear-and-show 0 ""
    print "GAME OVER" 
    print [newline "Computer books:" cbooks newline "Player books:" pbooks]
]

main

Rust

See Go Fish/Rust

Ruby

See Go Fish/Ruby

Tcl

See Go Fish/Tcl

V (Vlang)

See Go Fish/V (Vlang)

Wren

See Go Fish/Wren