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Rock-paper-scissors: Difference between revisions
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(R)ock, (P)aper, (S)cissors?
We both picked scissors. DRAW!</pre>
=={{header|Crystal}}==
Inspired by [[#Ruby]] solution, but improved to allow additional weapons
<lang ruby>
# conventional weapons
enum Choice
Rock
Paper
Scissors
end
BEATS = {
Choice::Rock => [Choice::Paper],
Choice::Paper => [Choice::Scissors],
Choice::Scissors => [Choice::Rock],
}
# uncomment to use additional weapons
# enum Choice
# Rock
# Paper
# Scissors
# Lizard
# Spock
# end
# BEATS = {
# Choice::Rock => [Choice::Paper, Choice::Spock],
# Choice::Paper => [Choice::Scissors, Choice::Lizard],
# Choice::Scissors => [Choice::Rock, Choice::Spock],
# Choice::Lizard => [Choice::Rock, Choice::Scissors],
# Choice::Spock => [Choice::Paper, Choice::Lizard],
# }
class RPSAI
@stats = {} of Choice => Int32
def initialize
Choice.values.each do |c|
@stats[c] = 1
end
end
def choose
v = rand(@stats.values.sum)
@stats.each do |choice, rate|
v -= rate
return choice if v < 0
end
raise ""
end
def train(selected)
BEATS[selected].each do |c|
@stats[c] += 1
end
end
end
enum GameResult
HumanWin
ComputerWin
Draw
def to_s
case self
when .draw?
"Draw"
when .human_win?
"You win!"
when .computer_win?
"I win!"
end
end
end
class RPSGame
@score = Hash(GameResult, Int32).new(0)
@ai = RPSAI.new
def check(player, computer)
return GameResult::ComputerWin if BEATS[player].includes? computer
return GameResult::HumanWin if BEATS[computer].includes? player
return GameResult::Draw
end
def round
puts ""
print "Your choice (#{Choice.values.join(", ")}):"
s = gets.not_nil!.strip.downcase
return false if "quit".starts_with? s
player_turn = Choice.values.find { |choice| choice.to_s.downcase.starts_with? s }
unless player_turn
puts "Invalid choice"
return true
end
ai_turn = @ai.choose
result = check(player_turn, ai_turn)
puts "H: #{player_turn}, C: #{ai_turn} => #{result}"
@score[result] += 1
puts "score: human=%d, computer=%d, draw=%d" % GameResult.values.map { |r| @score[r] }
@ai.train player_turn
true
end
end
game = RPSGame.new
loop do
break unless game.round
end</lang>
=={{header|D}}==
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