Javascript 为什么函数if/else if/else if语句返回相同的答案？

我有一个石头、布、剪刀的游戏，用户点击标有“石头”、“布”、“剪刀”的按钮，这会导致用户选择。 当我运行程序时，compareChoices（）函数总是返回“结果是平局，让我们再玩一次！”，我不明白为什么

岩石Rock
纸张
剪刀

您没有将任何内容传递到CompareChoice

岩石Rock
纸张
剪刀

您没有将任何内容传递到CompareChoice

岩石Rock
纸张
剪刀

您需要将参数传递给compareChoices（）

你应该只提醒一次，因为它们会靠得很近。大概是这样的：

function compareChoices(userChoice, ComputerChoice) {
    var message;
    if (userChoice === ComputerChoice) {
      message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - The result is a tie, let's play again!";
    } else if (userChoice === "Rock") {
      if (ComputerChoice === "Scissors") {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - Congratulations, you win!";
      } else {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - The computer wins! Care to play again?");
      }
    } else if (userChoice === "Scissors") {
      if (ComputerChoice === "Rock") {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - The computer wins, let's play again!";
      } else {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - Yippie! You win!";
      }
    } else if (userChoice === "Paper") {
      if (ComputerChoice === "Rock") {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - The computer wins. Don't give up, try again!";
      } else {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - Hail the all mighty visitor. Give it another go!";
      }
    }
  alert(message);
}

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您需要将参数传递给compareChoices（）

你应该只提醒一次，因为它们会靠得很近。大概是这样的：

function compareChoices(userChoice, ComputerChoice) {
    var message;
    if (userChoice === ComputerChoice) {
      message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - The result is a tie, let's play again!";
    } else if (userChoice === "Rock") {
      if (ComputerChoice === "Scissors") {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - Congratulations, you win!";
      } else {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - The computer wins! Care to play again?");
      }
    } else if (userChoice === "Scissors") {
      if (ComputerChoice === "Rock") {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - The computer wins, let's play again!";
      } else {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - Yippie! You win!";
      }
    } else if (userChoice === "Paper") {
      if (ComputerChoice === "Rock") {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - The computer wins. Don't give up, try again!";
      } else {
        message = "Computer: " + ComputerChoice + ", User: " + userChoice + " - Hail the all mighty visitor. Give it another go!";
      }
    }
  alert(message);
}

---

您必须将computerchoice放入变量中，并使用相同的computerchoice调用comparechoices函数

function rockPaperScissors(userchoice) {
       var computerchoice = getComputerChoice();
       alert("You chose " + userchoice + " ...the computer chose " + computerchoice + ".");
       compareChoices(userchoice, computerchoice);
    }

---

您必须将computerchoice放入变量中，并使用相同的computerchoice调用comparechoices函数

function rockPaperScissors(userchoice) {
       var computerchoice = getComputerChoice();
       alert("You chose " + userchoice + " ...the computer chose " + computerchoice + ".");
       compareChoices(userchoice, computerchoice);
    }

---

您没有为

compareChoices

传递任何

参数看起来您没有将参数传递到compareChoices（）函数这将有助于：
var computed=getComputerChoice（）；警报（“您选择了“+userchoice+”…计算机选择了“+computed+”）；比较（使用）