如何四舍五入到最接近的 0.5?
问题描述：
我必须显示评级，为此，我需要按如下方式递增:
I have to display ratings and for that, I need increments as follows:
| 输入 | 圆形 |
|---|---|
| 1.0 | 1 |
| 1.1 | 1 |
| 1.2 | 1 |
| 1.3 | 1.5 |
| 1.4 | 1.5 |
| 1.5 | 1.5 |
| 1.6 | 1.5 |
| 1.7 | 1.5 |
| 1.8 | 2.0 |
| 1.9 | 2.0 |
| 2.0 | 2.0 |
| 2.1 | 2.0 |
等等...
是否有一种简单的方法来计算所需的值?
Is there a simple way to compute the required values?
答
将您的评分乘以 2，然后使用 Math.Round(rating, MidpointRounding.AwayFromZero) 取整，然后将该值除以 2.
Multiply your rating by 2, then round using Math.Round(rating, MidpointRounding.AwayFromZero), then divide that value by 2.
Math.Round(value * 2, MidpointRounding.AwayFromZero)/2