Javascript:函数内的全局变量

Question

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，一旦我放置了一个数字，比如 5，它就会保留在该数字上，每次我运行代码时，它都会说“抱歉!计算机得到了 x，你得到了 5。”，即使我放了3。

如果我错了，请纠正我，但我相信发生这种情况是因为我试图更改函数内部的变量。我的主要问题是如何全局化函数内部的变量，以便可以在不同的函数中使用和修改它？

谢谢。

Answer 1

调用函数时可以传递值。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