Question

我有一个摇滚，纸张，剪刀游戏的代码，基本上是功课。我已经进行了双重检查，但似乎很好，但是，当我运行它时，它说：

SyntaxError: Unexpected token else,

任何帮助将非常感激:)请注意我是一个新手，所以如果问题是愚蠢的，请很好，并帮助＆lt; 3

我刚刚编辑了一下代码，因为我有很多“忽视”错误。我还想澄清一下，我需要位于function语句之后的所有代码都在函数内部，这就是为什么我不立即关闭第一个{。 PD：现在我得到：SyntaxError：Unexpected token =

var userChoice = prompt("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 if (choice1 ==== "paper") {
            if (choice2 === "rock") {
                return "paper wins";
            else if (choice2 === "scissors") {
                return "scissors wins"; }

            else {
                return "Paper wins"; }    
            }
        }
}

compare(userChoice, computerChoice)

Answer 1

如果您

，您会发现调试更容易

正确缩进，
除了最简单的if语句之外，使用大括号

例如：

Cell

Answer 2

始终正确格式化代码。在}语句之前，您缺少一堆else。总是在一条线的末尾使用分号（不，你在技术上不需要它是非常好的做法）。

另外，你需要注意你的平等。您有一个====而不是===

var userChoice = prompt("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 if (choice1 === "paper") {
        if (choice2 === "rock") {
          return "paper wins";
        } else if {
          return "paper wins";
        } else {
          return "Paper wins";
        }    
      }
    }
}

compare(userChoice, computerChoice)

Answer 3

考虑以更简单的方式重写它。

请参阅小提琴https://jsfiddle.net/DIRTY_SMITH/c7ww2hmz/1/

  var userChoice = prompt("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";
  }
  alert("the computer picked " + computerChoice);
  if ((computerChoice === "rock" && userChoice === "papper") || (computerChoice === "papper" && userChoice === "scissors") || (computerChoice === "scissors" && userChoice === "rock")) {
    alert("you won");
  } else if (computerChoice == userChoice) {
    alert("It's a tie");
  } else {
    alert("you loose");
  }

Answer 4

好的，为了坚持你的作业，我保持相同的格式只是解决了问题。

这里是：

  var userChoice = prompt("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!";
    }
    if (choice1 === "paper") {
      if (choice2 === "rock") {
        return "Paper wins!";
      } else {
        return "Paper looses!";
      }
    } else if (choice1 === "rock") {
      if (choice2 === "scissors") {
        return "Rock wins!";
      } else {
        return "Rock looses!";
      }
    }
    if (choice1 === "scissors") {
      if (choice2 === "paper") {
        return "Scissors wins!";
      } else {
        return "Scissors looses!";
      }
    }


  }
  compare(userChoice, computerChoice)

JavaScript SyntaxError：其他意外的令牌

4 个答案: