我正在制作一个有助于在 javascript 中计算卡片的二十一点游戏。功能之一是更新计数。为此，我放置了一个 switch 语句，如果牌是 2 到 6，则将计数加 1，如果牌是 J、K、Q 或 A，则将计数减 1。我已经多次查看我的代码，但无法找出问题所在。无论变量dc或ac等于什么，它始终默认为 switch 语句中的第一种情况。我什至尝试设置 ac = "three" ，它仍然默认为第一种情况。有人可以找出问题所在吗？谢谢！
只是更新计数功能：
//Update the count
function updateCount(){
var dc;
var pc;
var dealerCount = 0;
var playerCount = 0;
for(var d = 0; d < dealerCards.length; d += 1){
dc = dealerCards[d].name; //String
console.log("DC: " + dc);
switch(dc){
case "two":
dealerCount += 1;
console.log("d2");
break;
case "three":
dealerCount += 1;
console.log("d3");
break;
case "four":
dealerCount += 1;
console.log("d4");
break;
case "five":
dealerCount += 1;
console.log("d5");
break;
case "six":
dealerCount += 1;
console.log("d6");
break;
case "jack":
dealerCount -= 1;
console.log("dj");
break;
case "queen":
dealerCount -= 1;
console.log("dq");
break;
case "king":
dealerCount -= 1;
console.log("dk");
break;
case "ace":
dealerCount -= 1;
console.log("da");
break;
default:
dealerCount += 0;
}
}
for(var p = 0; p < playerCards.length; p += 1){
pc = playerCards[p].name; //String
console.log("PC: " + pc);
switch(pc){
case "two":
playerCount += 1;
console.log("p2");
break;
case "three":
playerCount += 1;
console.log("p3");
break;
case "four":
playerCount += 1;
console.log("p4");
break;
case "five":
playerCount += 1;
console.log("p5");
break;
case "six":
playerCount += 1;
console.log("p6");
break;
case "jack":
playerCount -= 1;
console.log("pj");
break;
case "queen":
playerCount -= 1;
console.log("pq");
break;
case "king":
playerCount -= 1;
console.log("pk");
break;
case "ace":
playerCount -= 1;
console.log("pa");
break;
default:
playerCount += 0;
}
}
//count = Count + Count
//setText("countLbl", "Count: " + (playerCount + dealerCount));
}var dealerCards = [];控制台输出：
DC = 王牌
大
DC = 九
d2
PC = 三
p2
PC = 三
p2
我的整个程序（注意：它不会在堆栈溢出中运行，因为它是在 code.org 的应用程序实验室中编写的，我被迫在课堂上使用它）
/* TODO:
* 1) Make play again button
* 2) Make reset button
* 3) Make count work
* 4) Make hide/show count button
* 5) Make first dealer card hidden
* 6) Check for blackjack on first deal
* 7) Make Ace = 1 if total is greater than 21
* 8) Make deck re-shuffle upon reset or cards run out
*/
//var Count = 0;
var playerCards = [];
var dealerCards = new Array();
var deckArr = new Array();
//Stores the properties each card can have
var cardProp = {
suit: ['heart', 'spade', 'club', 'diamond'],
value: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 11, 11],
name: ['ace', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten', 'jack', 'queen', 'king']
};
/*--------------------------------------------------------------------------------------------*/
console.log(playerCards.length);
populateDeck();
//console.log(deckArr.length);
//printDeck();
//deckArr = shuffleDeck(deckArr).slice(0);
printDeck();
console.log("----------------------------");
//STAND BUTTON
onEvent("standBtn", "click", function(){
//Check player for blackjack
if(getPlayerTotal() > 21){
showElement("winLoseLbl");
setText("winLoseLbl", "BUST! \n Dealer Wins!");
} else {
//Deal until dealer total is greater than 17
//then check for win
while(getDealerTotal() < 17){
dealerHit();
}
//Check for dealer or player win
if(getDealerTotal() < getPlayerTotal() || getDealerTotal() > 21){
showElement("winLoseLbl");
setText("winLoseLbl", "Player Wins!!");
} else {
showElement("winLoseLbl");
setText("winLoseLbl", "Dealer Wins!!");
}
}
});
//START BUTTON
onEvent("startBtn", "click", function(){
hideElement("startBtn");
dealPlayerCards();
dealDealerCards();
updateCount();
//TEMP Hide cards used for hit button
hideElement("dealerCard3");
hideElement("dealerCard4");
hideElement("playerCard3");
hideElement("playerCard4");
});
//DEAL BUTTON
//deal 2 cards to the player and 2 to the dealer
onEvent("dealBtn", "click", function(){
//Deal player cards
for(var c = 0; c < 2; c += 1){
console.log("Deck Arr Length: " + deckArr.length);
playerCards[c] = drawCard();
console.log("Deck Arr Length: " + deckArr.length);
displayCard(playerCards[c], "playerCard" + (c + 1));
console.log(playerCards[c]);
}
});
//HIT BUTTON
onEvent("hitBtn", "click", function(){
//Draws a card then displays it in the first hidden card
//slot if not already displayed, otherwise displays
//in the second hidden card slot
if(getProperty("playerCard3","hidden") === true){
playerCards[2] = drawCard();
showElement("playerCard3");
displayCard(playerCards[2], "playerCard" + 3);
} else if(getProperty("playerCard3", "hidden") === false && getProperty("playerCard4", "hidden") === true){
playerCards[3] = drawCard();
showElement("playerCard4");
displayCard(playerCards[3], "playerCard" + 4);
}
updateCount();
});
/*--------------------------------------------------------------------------------------------*/
function dealerHit(){
if(getProperty("dealerCard3","hidden") === true){
dealerCards[2] = drawCard();
showElement("dealerCard3");
displayCard(dealerCards[2], "dealerCard" + 3);
} else if(getProperty("dealerCard3", "hidden") === false && getProperty("dealerCard4", "hidden") === true){
dealerCards[3] = drawCard();
showElement("dealerCard4");
displayCard(dealerCards[3], "dealerCard" + 4);
}
}
function getDealerTotal(){
var total = 0;
for(var x = 0; x < dealerCards.length; x += 1){
total += dealerCards[x].value;
}
return total;
}
function getPlayerTotal(){
var total = 0;
for(var x = 0; x < playerCards.length; x += 1){
total += playerCards[x].value;
}
console.log(total);
return total;
}
function dealPlayerCards(){
for(var c = 0; c < 2; c += 1){
//console.log("Deck Arr Length: " + deckArr.length);
playerCards[c] = drawCard();
//console.log("Deck Arr Length: " + deckArr.length);
displayCard(playerCards[c], "playerCard" + (c + 1));
// console.log(playerCards[c]);
}
}
function dealDealerCards(){
for(var c = 0; c < 2; c += 1){
//console.log("Deck Arr Length: " + deckArr.length);
dealerCards[c] = drawCard();
//console.log("Deck Arr Length: " + deckArr.length);
displayCard(dealerCards[c], "dealerCard" + (c + 1));
//console.log(dealerCards[c]);
}
}
//Checks the deltCards array to see if a card was delt
//Draws a random card from the deck
function drawCard(){
var randomNum = randomNumber(0, deckArr.length - 1);
var returnCard;
//console.log("Random Num " + randomNum);
returnCard = deckArr[randomNum];
deckArr.splice(randomNum, 1);
//printDeck();
return returnCard;
}
//Displays the input card in the inputted position
function displayCard(card, position){
if(card !== undefined){
getKeyValue(card.name + "_" + card.suit, function(image){
setProperty(position, "image", image);
});
} else {
console.log("ERROR: NAME undefined");
write("UNDEFINED");
}
}
//Prints the deck for debugging
function printDeck(){
for(var x = 0; x < deckArr.length; x += 1){
console.log("#: " + x + " S: " + deckArr[x].suit + " V: " + deckArr[x].value + " N: " + deckArr[x].name);
}
}
//Sets each index of deckArr to
//a new object with the PROPERTIES: Value, Name, Suit, Image
function populateDeck(){
var count = 0;
for(var s = 0; s < cardProp.suit.length; s += 1)
for(var v = 0; v < cardProp.value.length; v += 1){
//Create new object
//ready to store properties in
deckArr[count] = {};
//Set Properties to object created above
deckArr[count].value = cardProp.value[v];
deckArr[count].name = cardProp.name[v];
deckArr[count].suit = cardProp.suit[s];
count += 1;
}
}
function shuffleDeck(deck){
var newDeck = new Array(deck.length);
var randomNum = randomNumber(0, deck.length - 1);
for(var c = deck.length - 1; c >= 0; c -= 1){
while(newDeck[randomNum] !== undefined){ //need to fix
randomNum = randomNumber((0, deck.length - 1));
}
newDeck[randomNum] = deck[c];
randomNum = randomNumber(0, deck.length - 1);
}
return newDeck;
}
//Checks for a win in the player or the dealer
function checkWin(){
for(var x = 0; x < playerCards.length; x += 1){
}
}
//Update the count
function updateCount(){
var dc;
var pc;
var dealerCount = 0;
var playerCount = 0;
for(var d = 0; d < dealerCards.length; d += 1){
dc = dealerCards[d].name;
console.log("DC: " + dc);
switch(dc.valueOf()){
case "two":
dealerCount += 1;
console.log("d2");
break;
case "three":
dealerCount += 1;
console.log("d3");
break;
case "four":
dealerCount += 1;
console.log("d4");
break;
case "five":
dealerCount += 1;
console.log("d5");
break;
case "six":
dealerCount += 1;
console.log("d6");
break;
case "jack":
dealerCount -= 1;
console.log("dj");
break;
case "queen":
dealerCount -= 1;
console.log("dq");
break;
case "king":
dealerCount -= 1;
console.log("dk");
break;
case "ace":
dealerCount -= 1;
console.log("da");
break;
default:
dealerCount += 0;
}
}
for(var p = 0; p < playerCards.length; p += 1){
pc = "three";
console.log("PC: " + pc);
switch(pc.valueOf){
case "two":
playerCount += 1;
console.log("p2");
break;
case "three":
playerCount += 1;
console.log("p3");
break;
case "four":
playerCount += 1;
console.log("p4");
break;
case "five":
playerCount += 1;
console.log("p5");
break;
case "six":
playerCount += 1;
console.log("p6");
break;
case "jack":
playerCount -= 1;
console.log("pj");
break;
case "queen":
playerCount -= 1;
console.log("pq");
break;
case "king":
playerCount -= 1;
console.log("pk");
break;
case "ace":
playerCount -= 1;
console.log("pa");
break;
default:
playerCount += 0;
}
}
//count = Count + Count
setText("countLbl", "Count: " + (playerCount + dealerCount));
}