MATLAB 中的石头、纸、剪刀

Question

好的，又到了一周中的那个时候，我正式用 MATLAB 举起双手寻求帮助。我本周的目标是尝试创建一个函数，该函数接受两个输入，即“Rock, Paper, Scissors”（或任何选择）的字符串，然后输出三个字符串之一“Player 1 Wins！” , '玩家 2 获胜！或“继续玩！”。要获胜，玩家必须在三分之二的时间内击败其他两个（打平算输）

function[winner] = RockPaperScissors(player1, player2)
[move1, others] = strtok(player1, ',');
[move2, rest] = strtok(others, ',');
[move3, ~] = strtok(rest, ',');

[go1, others] = strtok(player2, ',');
[go2, rest] = strtok(others, ',');
[go3, ~] = strtok(rest, ',');

Counter1 = 0;
Counter2 = 0;

for i = 1:3
if strcmp(move1, 'Rock') && strcmp(go1, 'Paper')
    Counter2 = Counter2 + 1;
elseif strcmp(move1, 'Rock') && strcmp(go1, 'Scissors')
    Counter2 = Counter2 + 1;
elseif strcmp(move1, 'Rock') && strcmp(go1, 'Rock')
    Counter1 = 0;
elseif strcmp(move1, 'Paper') && strcmp(go1, 'Paper')
    Counter1 = 0;   
elseif strcmp(move1, 'Paper') && strcmp(go1, 'Rock')
    Counter1 = Counter1 + 1;
elseif strcmp(move1, 'Paper') && strcmp(go1, 'Scissors')
    Counter2 = Counter2 + 1;
elseif strcmp(move1, 'Scissors') && strcmp(go1, 'Scissors')
    Counter1 = 0;
elseif strcmp(move1, 'Scissors') && strcmp(go1, 'Paper')
    Counter1 = Counter1 + 1;
elseif strcmp(move1, 'Scissors') && strcmp(go1, 'Rock')
    Counter2 = Counter2 + 1;
end
if strcmp(move2, 'Rock') && strcmp(go2, 'Paper')
    Counter2 = Counter2 + 1;
elseif strcmp(move2, 'Rock') && strcmp(go2, 'Scissors')
    Counter2 = Counter2 + 1;
elseif strcmp(move2, 'Rock') && strcmp(go2, 'Rock')
    Counter1 = 0;
elseif strcmp(move2, 'Paper') && strcmp(go2, 'Paper')
    Counter1 = 0;   
elseif strcmp(move2, 'Paper') && strcmp(go2, 'Rock')
    Counter1 = Counter1 + 1;
elseif strcmp(move2, 'Paper') && strcmp(go2, 'Scissors')
    Counter2 = Counter2 + 1;
elseif strcmp(move2, 'Scissors') && strcmp(go2, 'Scissors')
    Counter1 = 0;
elseif strcmp(move2, 'Scissors') && strcmp(go2, 'Paper')
    Counter1 = Counter1 + 1;
elseif strcmp(move2, 'Scissors') && strcmp(go2, 'Rock')
    Counter2 = Counter2 + 1;
end
if strcmp(move3, 'Rock') && strcmp(go3, 'Paper')
    Counter2 = Counter2 + 1;
elseif strcmp(move3, 'Rock') && strcmp(go3, 'Scissors')
    Counter2 = Counter2 + 1;
elseif strcmp(move3, 'Rock') && strcmp(go3, 'Rock')
    Counter1 = 0;
elseif strcmp(move3, 'Paper') && strcmp(go3, 'Paper')
    Counter1 = 0;   
elseif strcmp(move3, 'Paper') && strcmp(go3, 'Rock')
    Counter1 = Counter1 + 1;
elseif strcmp(move3, 'Paper') && strcmp(go3, 'Scissors')
    Counter2 = Counter2 + 1;
elseif strcmp(move3, 'Scissors') && strcmp(go3, 'Scissors')
    Counter1 = 0;
elseif strcmp(move3, 'Scissors') && strcmp(go3, 'Paper')
    Counter1 = Counter1 + 1;
elseif strcmp(move3, 'Scissors') && strcmp(go3, 'Rock')
    Counter2 = Counter2 + 1;
end

if max(Counter1, Counter2) == Counter2
    winner = 'Player 2 Wins!';
elseif max(Counter1, Counter2) == Counter1
    winner = 'Player 1 Wins!';
elseif max(Counter1, Counter2) ~= (Counter1 || Counter2) % I tried making a Counter 3, did not work out
    winner = 'Keep Playing!';
end

end

如您所见，我让这个坏男孩大部分都在逃跑。我现在的问题是，当我运行测试用例时' [winner1] = rockPaperScissors('Rock,Scissors,Scissors','Paper,Rock,Scissors') 它以垂直的“ans”输出我的答案，而不是作为赢家。此外，它给了我“玩家 2 赢！”即使它应该是一个领带。我尝试全部调试，但无法弄清楚我的问题出在哪里。呸！

Answer 1

您需要使用函数strcmp 而不是== 运算符。输入是 char 数组，这就是 == 抱怨维度的原因。

这是您的第一个 if 语句的示例：

if strcmp(move1, 'Rock') && strcmp(go1, 'Paper')
    winner1 = 'Player 2 Wins!';

这里我做了 2 处更改，第一个是使用 strcmp，第二个是使用标量 AND 即&&

请参阅help strcmp 和帮助&& 了解更多详情。

Answer 2

您是否真的考虑过使用table？它非常适合您的目的！

只是一个想法，如何做。请不要指摘我，我没有考虑到您的所有限制和条件，但是您应该很容易根据自己的喜好调整我的功能。

function RockPaperScissorsLizardSpock(player1, player2, rounds)

%// creating the table with all combinations
header = {'Rock';'Paper';'Scissors';'Lizard';'Spock'};
Rock = [0;-1;1;1;-1];
Paper = [1;0;-1;-1;1];
Scissors = [-1;1;0;1;-1];
Lizard = [-1;1;-1;0;1];
Spock = [1;-1;1;-1;0];
T = table(Rock,Paper,Scissors,Lizard,Spock,'RowNames',header);


%// play and display winners of every round
points = 0;
for ii = 1:rounds

   pointsRound  =  T{player1(ii), player2(ii)};   %// no need for if-conditions
                                                  %// one line is enough
   points = points + pointsRound;

   if     pointsRound > 0;  disp(['Player 1 wins round ' num2str(ii) '!'])
   elseif pointsRound < 0;  disp(['Player 2 wins round ' num2str(ii) '!'])
   else                     disp(['Draw in round ' num2str(ii) '!'])
   end

end

%// display overall winner
if     points >  rounds/2; disp('Player 1 Wins!')
elseif points == 0;        disp(['Draw!' num2str(ii) '!'])
else                       disp('Player 2 Wins!')

end

现在开始玩吧：

player1 = {'Rock','Scissors','Scissors'}
player2 = {'Paper','Rock','Scissors'}

RockPaperScissorsLizardSpock(player1, player2, 3)

返回：

Player 1 wins round 1!
Player 1 wins round 2!
Tie in round 3!
Player 1 Wins!

---

您还可以实现一些高级功能，例如为玩家命名：

function RockPaperScissorsLizardSpock(player1, player2, rounds)

plname = inputname(1);
p2name = inputname(2);

...

   if     pointsRound > 0;  disp([plname ' wins round ' num2str(ii) '!'])

...

else                disp([p2name ' Wins!'])

end

和

Sheldon = {'Spock','Spock','Spock'}
Penny = {'Paper','Rock','Scissors'}

RockPaperScissorsLizardSpock(sheldon, penny, 3)

产量

Sheldon wins round 1!
Penny wins round 2!
Penny wins round 3!
Penny Wins!

---

如果您坚持使用逗号输入字符串：

Sheldon = 'Spock,Spock,Spock'
Penny = 'Paper,Rock,Scissors'

你需要在函数中添加strsplit：

player1= strsplit(player1,',')
player2= strsplit(player2,',')