Javascript：在函数内全球化变量答案

【问题标题】：Javascript: Globalizing variables inside functionJavascript：在函数内全球化变量
【发布时间】：2013-10-05 20:21:06
【问题描述】：

所以我有以下代码：

var func1 = function() {
    var userChoose = prompt("Choose a number from 1-10. If you choose the same number as the computer, you win!");
    func2();
};

var func2 = function() {
    computerChoose = Math.random();
    computerChoose = Math.round(computerChoose*10)/10;
    if (userChoose === computerChoose) {
        console.log("You won! The computer chose the number " + userChoice + " just like you! Good job!");
    } else if (userChoose > 10) {
        console.log("I'm sorry, you wrote something above 10. Try again.");
    } else {
        console.log("Sorry! The computer got " + computerChoose + 
        " and you got " + userChoose + ". Sorry!");
    }
};

func1();

我遇到的问题是，一旦我输入了一个数字，比如说 5，它就会一直保持这个数字，每次我运行代码时它都会说“对不起！计算机得到 x 而你得到 5。”，即使我放了 3 个。

如果我错了，请纠正我，但我相信这是因为我试图更改函数内部的变量。我的主要问题是如何将函数内部的变量全球化，以便在不同的函数中使用和修改？

谢谢。

【问题讨论】：

标签： javascript function variables globalization

【解决方案1】：

您可以在调用函数时传递值。试试这个：

var func1 = function() {
    var userChoose = prompt("Choose a number from 1-10. If you choose the same number as the computer, you win!");
    func2(userChoose);
};

var func2 = function(userChoose ) {
    computerChoose = Math.random();
    computerChoose = Math.round(computerChoose*10)/10;
    if (userChoose === computerChoose) {
        console.log("You won! The computer chose the number " + userChoice + " just like you! Good job!");
    } else if (userChoose > 10) {
        console.log("I'm sorry, you wrote something above 10. Try again.");
    } else {
        console.log("Sorry! The computer got " + computerChoose + 
        " and you got " + userChoose + ". Sorry!");
    }
};

func1();

演示here

【讨论】：