Question

在此功能中，首先要求用户从rps数组[石头和剪刀]中选择一个，然后从数组中随机选择一个，然后为其分配变量计算机
然后找到两个选择的索引的索引，将这些索引隐式化并分配给变量梳，并传递给switch语句以评估并显示适当的msg，但在我的switch语句代码中，只有默认语句正在执行

请给我建议一个解决方案。

function RockPaperScissor() {
var rps = ["rock", "paper", "scissor"];
var player1 = prompt("Which one do you choose " + rps + "?");
var play1 = rps.indexOf(player1);
console.log("Player: " + play1);
var rand = Math.floor(Math.random() * rps.length);
console.log("computer: " + rand);
var computer = rps[rand];
var comb = play1.toString() + rand.toString();
console.log(comb);
if ((comb == '21') || (comb == '10') || (comb == '02')) {
    alert("You choosed " + player1 + " and computer choosed " + computer + " Congrats!!! You Won");
}
else if ((comb == '12') || (comb == '01') || (comb == '20')) {
    alert("You choosed " + player1 + " and computer choosed " + computer + " Sorry!!! You Lost");
}
else {
    alert("You choosed " + player1 + " and computer choosed " + computer + " Match got tied");
}
// switch (comb) {
//     case "21": alert("You choosed " + player1 + " and computer choosed " + computer + " Congrats!!! You Won");
//         break;
//     case "10": alert("You choosed " + player1 + " and computer choosed " + computer + " Congrats!!! You Won");
//         break;
//     case "02": alert("You choosed " + player1 + " and computer choosed " + computer + " Congrats!!! You Won");
//         break;

//     case "12": alert("You choosed " + player1 + " and computer choosed " + computer + " Sorry!!! You Lost");
//         break;
//     case "01": alert("You choosed " + player1 + " and computer choosed " + computer + " Sorry!!! You Lost");
//         break;
//     case "20": alert("You choosed " + player1 + " and computer choosed " + computer + " Sorry!!! You Lost");
//         break;

//     default: alert("You choosed " + player1 + " and computer choosed " + computer + " Match got tied");
// }
}

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Random Switch</title>
    <script src="random_switch.js"></script>
</head>
<body>
   
    <input type="button" value="Rock Paper Scissor" onclick="RockPaperScissor()">
</body>
</html>

Answer 1

您只需要在开关case中使用字符串值，因为comb是String类型而不是整数。

function RockPaperScissor() {
    var rps = ["rock", "paper", "scissor"];
    var player1 = prompt("Which one do you choose " + rps + "?");
    var play1 = rps.indexOf(player1);
    console.log("Player: " + play1);
    var rand = Math.floor(Math.random() * rps.length);
    console.log("computer: " + rand);
    var computer = rps[rand];
    var comb = play1.toString() + rand.toString();
    console.log(comb);
    switch (comb) {
        case '21': alert("You choosed " + player1 + " and computer choosed " + computer + " Congrats!!! You Won");
            break;
        case '10': alert("You choosed " + player1 + " and computer choosed " + computer + " Congrats!!! You Won");
            break;
        case '02': alert("You choosed " + player1 + " and computer choosed " + computer + " Congrats!!! You Won");
            break;
        case '12': alert("You choosed " + player1 + " and computer choosed " + computer + " Sorry!!! You Lost");
            break;
        case '01': alert("You choosed " + player1 + " and computer choosed " + computer + " Sorry!!! You Lost");
            break;
        case '20': alert("You choosed " + player1 + " and computer choosed " + computer + " Sorry!!! You Lost");
            break;

        default: alert("You choosed " + player1 + " and computer choosed " + computer + " Match got tied");
    }
}

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Random Switch</title>
  <script src="random_switch.js"></script>
</head>

<body>

  <input type="button" value="Rock Paper Scissor" onclick="RockPaperScissor()">
</body>

</html>

Answer 2

在这里，梳子是字符串类型，在我的情况下，我已经传递了一个数字，因此所有情况下仅执行默认填充都失败

javascript中switch语句的异常

2 个答案: