Question

我正在冷聚变式中作如下行动说明:

页: 1

我:

24.3243243243243

计算器给我:

24.32432432432432

Note the extra 2 at the end.

因此,当我试图拿到24.32432432243 * 3.7,然后我拿到89.99999999999美元时,我就会出现问题。这是错误的。

为什么行动说明拖延了价值,我如何避免这样做,这样我就获得计算员获得的适当数额?

非常感谢。

Answer 1

圆桌会议

var toFixed:Function = function(number, factor) {
    return (Math.round(number * factor)/factor);
}

Where the factor is 10, 100, 1000 etc, a simple way to think about it is the number of 0 s in the factor is the number of decimal places

......

页: 1

Answer 2

Good explanation of numeric in ActionScript can be found at http://docstore.mik.ua/orelly/web2/action/ch04_03.htm. See section 4.3.2.1. Floating-point precision

A relavant quote:

“为了弥补时间上的不一致,如果差异会对你的代码的行为产生不利影响,你应人工打上你的号码。 “......