Question

我正在开展一个项目，根据随机生成的数量，这将给我一个随机的城镇财富。然而，每当我按下“建立乡镇”按钮时，我总是变得“富裕”。如何修复代码以启用所需的结果？

<!DOCTYPE html>
<html>
<body>
<style>
h1 {font-size: 20pt; color: red;}
    p {font-size: 17pt; color: blue;}
    p2 {font-size: 18pt; color: orange;}
    p3 {font-size: 18pt; color: green;}
</style>
<p>This program will create a random town upon the click of a button.</p>

<button onclick="numberdescription()">Establish Township</button>
<br /><br /><br />
<p3 id="random"></p3>

<script>

function numberdescription() {
var num = Math.floor(Math.random() * 3 + 1)
    if (num = 1) {
        desc = "wealthy";
    } else if (num = 2) {
        desc = "middle wealth";
    } else {
        desc = "dirt poor";
    }
document.getElementById("random").innerHTML = desc;
}
</script>

</body>
</html>

Answer 1

=被视为assignment operator。您需要等于运算符==，它是comparison operator

function numberdescription() {
    var num = Math.floor(Math.random() * 3 + 1)
    if (num == 1) {
        desc = "wealthy";
    } else if (num == 2) {
        desc = "middle wealth";
    } else {
        desc = "dirt poor";
    }
    document.getElementById("random").innerHTML = desc;
}

Answer 2

单个=符号赋值，因此您使用此代码

为num赋值1

num = 1

将double =替换为double ==。

num == 1

以下是JavaScript comparison and logical operators的列表。

为什么我的随机数发生器总是给我一个？

2 个答案: