关于javascript：我似乎无法返回函数内部的结果


I cant seem to return the result of inside the function

我已经创建了一个基本的石头剪刀游戏，我无法在函数内返回结果。

我一直在尝试一切

链接控制台记录比较并将其放入变量..

console.log(compare)由于某种原因返回undefined。

请帮忙

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var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
var result;

if (computerChoice < 0.34) {
    computerChoice ="rock";
} else if(computerChoice <= 0.67) {
    computerChoice ="paper";
} else {
    computerChoice ="scissors";
} console.log("Computer's choice:" + computerChoice);
  console.log("Your choice:" + userChoice);
  console.log(computerChoice +" vs" + userChoice);
 

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

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var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
var result;

if (computerChoice < 0.34) {
    computerChoice ="rock";
} else if(computerChoice <= 0.67) {
    computerChoice ="paper";
} else {
    computerChoice ="scissors";
} console.log("Computer's choice:" + computerChoice);
  console.log("Your choice:" + userChoice);
  console.log(computerChoice +" vs" + userChoice);

function compare(userChoice, computerChoice){
    if (userChoice === computerChoice){
        return   "The result is a tie!";
    } else if (userChoice ==="rock"){
       if(computerChoice ==="scissors"){
        return"rock wins!";    
       }
       else {
         return"paper wins!";      
       }
    } else if (userChoice ==="paper") {
        if(computerChoice ==="rock") {
        return"paper wins!";
        }
        else {
        return"scissors wins!";
        }
    } else if (userChoice ==="scissors") {
        if(computerChoice ==="rock") {
        return"rock wins!";
        }
        else {
        return"scissors wins!";
        }
    }
     
}
var Compare = compare(userChoice, computerChoice);
console.log(Compare);

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这里的主要问题是你从未执行过你编写的匿名函数。 我比较了一个普通函数而不是匿名函数，只是为了让它更像其他语言。 这是一个很好的工作代码：

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var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
var result;

if (computerChoice < 0.34) {
    computerChoice ="rock";
} else if(computerChoice <= 0.67) {
    computerChoice ="paper";
} else {
    computerChoice ="scissors";
} console.log("Computer's choice:" + computerChoice);
  console.log("Your choice:" + userChoice);
  console.log(computerChoice +" vs" + userChoice);


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

}
console.log(compare(userChoice, computerChoice));

正如Shinra tensei所提到的那样，第18行中的=导致了错误。
这是一个更新的剪辑。 我还为比较功能添加了一个警报。

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var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
var result;

if (computerChoice < 0.34) {
    computerChoice ="rock";
} else if(computerChoice <= 0.67) {
    computerChoice ="paper";
} else {
    computerChoice ="scissors";
} console.log("Computer's choice:" + computerChoice);
  console.log("Your choice:" + userChoice);
  console.log(computerChoice +" vs" + userChoice);
 
  alert(compare(userChoice,computerChoice));

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

你在这里有语法错误......

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return  = "The result is a tie!";

将此更改为：

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return"The result is a tie!";
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