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Rock-paper-scissors: Difference between revisions
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rock
Computer picked paper, paper wins!</pre>
=={{header|Ruby}}==
<lang ruby>class RockPaperScissorsGame
def initialize()
@pieces = %w[rock paper scissors]
@beats = {
'rock' => 'paper',
'paper' => 'scissors',
'scissors' => 'rock',
}
@plays = {
'rock' => 1,
'paper' => 1,
'scissors' => 1,
}
@score = [0, 0]
play
end
def humanPlay()
answer = nil
loop do
print "\nYour choice: #@pieces? "
answer = STDIN.gets.strip.downcase
next if answer.empty?
if idx = @pieces.find_index {|piece| piece.match(/^#{answer}/)}
answer = @pieces[idx]
break
else
puts "invalid answer, try again"
end
end
print "H: #{answer}, "
answer
end
def computerPlay()
total = @plays.values.reduce(:+)
r = rand(total) + 1
sum = 0
humans_choice = nil
@pieces.each do |piece|
sum += @plays[piece]
if r <= sum
humans_choice = piece
break
end
end
choice = @beats[humans_choice]
print "C: #{choice} => "
choice
end
def play
loop do
h = humanPlay
c = computerPlay
# only update the human player's history after the computer has chosen
@plays[h] += 1
if h == c
puts "draw"
elsif h == @beats[c]
puts "Human wins"
@score[0] += 1
else
puts "Computer wins"
@score[1] += 1
end
puts "score: human=#{@score[0]}, computer=#{@score[1]}"
end
end
end
game = RockPaperScissorsGame.new</lang>
sample game where human always chooses rock:
<pre style="height: 40ex; overflow: scroll">Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: rock => draw
score: human=0, computer=0
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=1
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: rock => draw
score: human=0, computer=1
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=2
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=3
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=4
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=5
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=6
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=7
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=8
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=9
Your choice: ["rock", "paper", "scissors"]? r
H: rock, C: paper => Computer wins
score: human=0, computer=10</pre>
=={{header|Tcl}}==
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