javascript - Codecademy 上的石头剪刀布游戏

Question

我尝试合并网站(Codecademy)上给出的附加建议，即。存在平局的功能以及再次接受输入的规定。这是包含错误的代码段:

var userChoice, computerChoice;

var choicesDetermination = function(){
    userChoice = prompt("Do you choose rock, paper or scissors?");
    if(userChoice !== "rock" && userChoice !== "paper" && userChoice !== "scissors"){
        userChoice = prompt("Invalid input. Please try again.\n Do you choose rock, paper or scissors?");
    }
    computerChoice = Math.random();
    if (computerChoice < 0.34) {
        computerChoice = "rock";
    } else if(computerChoice <= 0.67) {
        computerChoice = "paper";
    } else {
        computerChoice = "scissors";
    } 
    console.log("User: " + userChoice);
    console.log("Computer: " + computerChoice);
}

var compare = function(choice1, choice2){
    if(choice1 === choice2){
        console.log("The result is a tie! Let's try one more time.");
        choicesDetermination();
        compare(userChoice, computerChoice);
    }
    else if(choice1 === "rock"){
        if(choice2 === "scissors"){
            return "rock wins";
        }
        else{
            return "paper wins";
        }
    }
    else if(choice1 === "paper"){
        if(choice2 === "rock"){
            return "paper wins";
        }
        else{
            return "scissors wins";
        }
    }
    else{
        if(choice1 === "scissors"){
            if(choice2 === "paper"){
                return "scissors wins";
            }
            else{
                return "rocks wins";
            }
        }
    }
}
choicesDetermination();
compare(userChoice, computerChoice);

这里，choicesDetermination() 是我获取输入并将其存储在 userChoice、computerChoice(均为全局变量)中的函数。我不知道为什么，但当我再次要求输入时，代码似乎运行良好；变量已正确更改。但是函数compare()运行不正确； return 语句不会打印到屏幕上。

Answer 1

我在 Code Academy 中一直发现输出字符串必须非常完美，所以首先检查一下!

我认为您的代码的问题在于您实际上应该返回“结果是平局!让我们再试一次。” 不 console.log.

请在下面找到我完整的传递代码:

var userChoice = prompt("Do you choose rock, paper or scissors?");
if (userChoice != "rock" && "scissors" && "paper") {
    alert("Please enter 'rock', 'scissors', or 'paper' as shown.");
    userChoice = prompt("Type carefully, please: Do you choose rock, paper or scissors?");
}
var computerChoice = Math.random();
if (computerChoice < 0.34) {
    computerChoice = "rock";
} else if(computerChoice <= 0.67) {
    computerChoice = "paper";
} else {
    computerChoice = "scissors";
} console.log("Computer: " + computerChoice);

var compare = function(choice1, choice2) {
    if (choice1 === choice2) {
        return "The result is a tie!";
    }
    else if (choice1 === "rock") {
        if (choice2 === "scissors") {
            return "rock wins";
        }
        else {
            return "paper wins";
        }
    }
    else if (choice1 === "paper") {
        if (choice2 === "rock") {
            return "paper wins"; 
        }
        else {
            return "scissors wins";
        }
    }
    else {
        if (choice2 === "rock") {
            return "rock wins";
        }
        else {
            return "scissors wins";
        }
    }
};

compare(userChoice, computerChoice);