繼上次的抽牌程式後，我們再來玩一個遊戲，發13張牌：
程式的作法：
- 先放52張牌在一個牌池裏 (allCards陣列)
- 每次從牌池抽一張牌 (取隨機數，第1次1~52，第2次 1~51，也就是每次抽牌後，牌池就少一張牌)
- 將抽到的牌放到遊戲者的牌池中 playOne陣列
完整程式碼：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Playing Card</title>
<style>
body{
display: flex;
flex-direction: column;
align-items: center;
}
img {
width: 100px;
}
.button{
border-radius: 20px;
outline: none;
margin: 10px auto;
font-size: 40px;
}
</style>
</head>
<body>
<div id="card">
<img src="imagesblue_back.png">
</div>
<button class="font button" onclick="selectCard();">發牌</button>
<script>
function selectCard(){
var playerOne = [];
var allCards = ["",
"AC", "2C", "3C", "4C", "5C", "6C", "7C", "8C", "9C", "10C", "JC", "QC", "KC",
"AD", "2D", "3D", "4D", "5D", "6D", "7D", "8D", "9D", "10D", "JD", "QD", "KD",
"AH", "2H", "3H", "4H", "5H", "6H", "7H", "8H", "9H", "10H", "JH", "QH", "KH",
"AS", "2S", "3S", "4S", "5S", "6S", "7S", "8S", "9S", "10S", "JS", "QS", "KS"
];
var cardImages="";
for (var i = 1; i <= 13; i++){
var selectedCard = getRandom(1,54-i); //當i=1時，隨機數介於1~52間，i=2時，隨機數介於1~51間
var card = allCards [selectedCard];
allCards.splice(selectedCard, 1);
playerOne.push(card);
cardImages += `<img src='images/${card}.png' alt='Playing Card'>`;
console.log(allCards);
console.log(playOne);
}
var card_div = document.getElementById("card");
card_div.innerHTML = cardImages;
}
function getRandom(min, max) { // min <= x < max, x是整數亂數
return Math.floor(Math.random() * (max - min) ) + min;
}
</script>
</body>
</html>
後面的課題：
- 賸下三個玩家的牌(這很簡單，只要重覆程式裏的發13張牌迴圈3次)
- 把發好的牌顯示在畫面上，玩家1的牌在正上方，玩家2的牌在右邊，玩家3的牌在正下方，玩家4的牌在左邊，玩家2與3的牌需要進行90度的旋轉。
程式的作法：