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Rock-paper-scissors: Difference between revisions
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Seed = time(NULL);
").</lang>
=={{header|Nim}}==
<lang Nim>import random, strutils, tables
type
Choice {.pure.} = enum Rock, Paper, Scissors
History = tuple[total: int; counts: CountTable[Choice]]
const Successors: array[Choice, Choice] = [Paper, Scissors, Rock]
func `>`(a, b: Choice): bool =
## By construction, only the successor is greater than the choice.
a == Successors[b]
proc choose(history: History): Choice =
## Make a weighted random choice using the player counts
## then select the choice likely to beat it.
var value = rand(1..history.total)
for choice, count in history.counts.pairs:
if value <= count:
return Successors[choice]
dec value, count
randomize()
# Initialize history with one for each choice in order to avoid special case.
var history: History = (3, [Rock, Paper, Scissors].toCountTable)
echo "To quit game, type 'q' when asked for your choice."
var myChoice, yourChoice: Choice
var myWins, yourWins = 0
while true:
# Get player choice.
try:
stdout.write "Rock(1), paper(2), scissors(3). Your choice? "
let answer = stdin.readLine().strip()
if answer == "q":
quit "Quitting game.", QuitSuccess
if answer notin ["1", "2", "3"]:
echo "Invalid choice."
continue
yourChoice = Choice(ord(answer[0]) - ord('1'))
except EOFError:
quit "Quitting game.", QuitFailure
# Make my choice.
myChoice = history.choose()
echo "I choosed ", myChoice, '.'
history.counts.inc yourChoice
inc history.total
# Display result of round.
if myChoice == yourChoice:
echo "It’s a tie."
elif myChoice > yourChoice:
echo "I win."
inc myWins
else:
echo "You win."
inc yourWins
echo "Total wins. You: ", yourWins, " Me: ", myWins</lang>
{{out}}
<pre>To quit game, type 'q' when asked for your choice.
Rock(1), paper(2), scissors(3). Your choice? 1
I choosed Rock.
It’s a tie.
Total wins. You: 0 Me: 0
Rock(1), paper(2), scissors(3). Your choice? 1
I choosed Rock.
It’s a tie.
Total wins. You: 0 Me: 0
Rock(1), paper(2), scissors(3). Your choice? 1
I choosed Paper.
I win.
Total wins. You: 0 Me: 1
Rock(1), paper(2), scissors(3). Your choice? 1
I choosed Rock.
It’s a tie.
Total wins. You: 0 Me: 1
Rock(1), paper(2), scissors(3). Your choice? 1
I choosed Paper.
I win.
Total wins. You: 0 Me: 2
Rock(1), paper(2), scissors(3). Your choice? 1
I choosed Paper.
I win.
Total wins. You: 0 Me: 3
Rock(1), paper(2), scissors(3). Your choice? 1
I choosed Paper.
I win.
Total wins. You: 0 Me: 4
Rock(1), paper(2), scissors(3). Your choice? 1
I choosed Paper.
I win.
Total wins. You: 0 Me: 5
Rock(1), paper(2), scissors(3). Your choice? 1
I choosed Paper.
I win.
Total wins. You: 0 Me: 6
Rock(1), paper(2), scissors(3). Your choice? q
Quitting game.</pre>
=={{header|NS-HUBASIC}}==
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