Oliver Eyton-Williams ee1e8abd87

feat(curriculum): restore seed + solution to Chinese (#40683 )

* feat(tools): add seed/solution restore script

* chore(curriculum): remove empty sections' markers

* chore(curriculum): add seed + solution to Chinese

* chore: remove old formatter

* fix: update getChallenges

parse translated challenges separately, without reference to the source

* chore(curriculum): add dashedName to English

* chore(curriculum): add dashedName to Chinese

* refactor: remove unused challenge property 'name'

* fix: relax dashedName requirement

* fix: stray tag

Remove stray `pre` tag from challenge file.

Signed-off-by: nhcarrigan <nhcarrigan@gmail.com>

Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>

2021-01-12 19:31:00 -07:00

3.6 KiB

Raw Blame History

id, title, challengeType, videoUrl, forumTopicId, dashedName

id	title	challengeType	videoUrl	forumTopicId	dashedName
565bbe00e9cc8ac0725390f4	21点游戏	1	https://scrimba.com/c/c6KE7ty	16809	counting-cards

--description--

在赌场 21 点游戏中，玩家可以通过计算牌桌上已经发放的卡牌的高低值来让自己在游戏中保持优势，这就叫21 点算法。

根据下面的表格，每张卡牌都分配了一个值。如果卡牌的值大于 0，那么玩家应该追加赌注。反之，追加少许赌注甚至不追加赌注。

Count Change	Cards
+1	2, 3, 4, 5, 6
0	7, 8, 9
-1	10, 'J', 'Q', 'K', 'A'

你需要写一个函数实现 21 点算法，它根据参数card的值来递增或递减变量count，函数返回一个由当前count和Bet（count>0）或Hold（count<=0）拼接的字符串。注意count和"Bet"或Hold应该用空格分开。

例如：
-3 Hold 5 Bet

提示
既然 card 的值为 7、8、9 时，count 值不变，那我们就可以忽略这种情况。

--hints--

Cards Sequence 2, 3, 4, 5, 6 应该返回5 Bet。

assert(
  (function () {
    count = 0;
    cc(2);
    cc(3);
    cc(4);
    cc(5);
    var out = cc(6);
    if (out === '5 Bet') {
      return true;
    }
    return false;
  })()
);

Cards Sequence 7, 8, 9 应该返回 0 Hold。

assert(
  (function () {
    count = 0;
    cc(7);
    cc(8);
    var out = cc(9);
    if (out === '0 Hold') {
      return true;
    }
    return false;
  })()
);

Cards Sequence 10, J, Q, K, A 应该返回 -5 Hold。

assert(
  (function () {
    count = 0;
    cc(10);
    cc('J');
    cc('Q');
    cc('K');
    var out = cc('A');
    if (out === '-5 Hold') {
      return true;
    }
    return false;
  })()
);

Cards Sequence 3, 7, Q, 8, A 应该返回 -1 Hold。

assert(
  (function () {
    count = 0;
    cc(3);
    cc(7);
    cc('Q');
    cc(8);
    var out = cc('A');
    if (out === '-1 Hold') {
      return true;
    }
    return false;
  })()
);

Cards Sequence 2, J, 9, 2, 7 应该返回 1 Bet。

assert(
  (function () {
    count = 0;
    cc(2);
    cc('J');
    cc(9);
    cc(2);
    var out = cc(7);
    if (out === '1 Bet') {
      return true;
    }
    return false;
  })()
);

Cards Sequence 2, 2, 10 应该返回 1 Bet。

assert(
  (function () {
    count = 0;
    cc(2);
    cc(2);
    var out = cc(10);
    if (out === '1 Bet') {
      return true;
    }
    return false;
  })()
);

Cards Sequence 3, 2, A, 10, K 应该返回 -1 Hold。

assert(
  (function () {
    count = 0;
    cc(3);
    cc(2);
    cc('A');
    cc(10);
    var out = cc('K');
    if (out === '-1 Hold') {
      return true;
    }
    return false;
  })()
);

--seed--

--seed-contents--

var count = 0;

function cc(card) {
  // Only change code below this line


  return "Change Me";
  // Only change code above this line
}

cc(2); cc(3); cc(7); cc('K'); cc('A');

--solutions--

var count = 0;
function cc(card) {
  switch(card) {
    case 2:
    case 3:
    case 4:
    case 5:
    case 6:
      count++;
      break;
    case 10:
    case 'J':
    case 'Q':
    case 'K':
    case 'A':
      count--;
  }
  if(count > 0) {
    return count + " Bet";
  } else {
    return count + " Hold";
  }
}

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