Rock-paper-scissors: Difference between revisions

</pre>

=={{header|Sidef}}==

<lang ruby>const rps = qw(r p s);

var msg = [

"Rock breaks scissors",

"Paper covers rock",

"Scissors cut paper",

];

[

"\n>> Rock Paper Scissors <<\n",

"** Enter 'r', 'p', or 's' as your play.",

"** Enter 'q' to exit the game.",

"** Running score shown as <your wins>:<my wins>\n",

].map {_.say};

var plays = 0;

var aScore = 0;

var pScore = 0;

var pi = ''; # player input

var pcf = [0,0,0]; # pcf = player choice frequency

var aChoice = (3.rand.int); # ai choice for first play is completely random

{

"Play: ".print;

pi = Sys.scanln; # get player choice

pi == 'q' && (break);

var pChoice = rps.indexWhere{_ == pi};

if (var block = __BLOCK__; pChoice == -1) {

"Invalid input!\n".warn;

block.run;

}

pcf[pChoice]++;

plays++;

# show result of play

">> My play: %-8s".printf(rps[aChoice]);

given ((aChoice - pChoice + 3 ) % 3)

when (0) do {

"Tie.".say;

}

when (1) do {

"%-*s %s".printlnf(30, msg[aChoice], 'My point');

aScore++;

}

when (2) do {

"%-*s %s".printlnf(30, msg[pChoice], 'Your point');

pScore++;

}

end;

# show score

"%-6s".printf("%d:%d".sprintf(pScore, aScore));

# compute ai choice for next play

switch (var rn = (plays.rand.int))

case (rn < pcf[0]) do {

aChoice = 1;

}

case (pcf[0]+pcf[1] > rn) do {

aChoice = 2;

}

default {

aChoice = 0;

}

end;

__BLOCK__.run;

}.run;</ruby>

'''Output:'''

<pre>

>> Rock Paper Scissors <<

** Enter 'r', 'p', or 's' as your play.

** Enter 'q' to exit the game.

** Running score shown as <your wins>:<my wins>

Play: r

>> My play: s Rock breaks scissors Your point

1:0 Play: p

>> My play: p Tie.

1:0 Play: r

>> My play: s Rock breaks scissors Your point

2:0 Play: s

>> My play: p Scissors cut paper Your point

3:0 Play: r

>> My play: p Paper covers rock My point

3:1 Play: p

>> My play: r Paper covers rock Your point

4:1 Play: q