将 double 转换为 int [英] convert double to int

查看:20
本文介绍了将 double 转换为 int的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

double 转换为 int 的最佳方法是什么?应该使用演员表吗?

What is the best way to convert a double to an int? Should a cast be used?

推荐答案

如果您想要默认截断为零的行为,您可以使用强制转换.或者,您可能想使用 Math.CeilingMath.RoundMath.Floor 等 - 尽管之后您仍然需要演员表.

You can use a cast if you want the default truncate-towards-zero behaviour. Alternatively, you might want to use Math.Ceiling, Math.Round, Math.Floor etc - although you'll still need a cast afterwards.

别忘了int的范围比double的范围小很多.如果值在未经检查的上下文中超出 int 的范围,从 doubleint 的强制转换不会引发异常,而调用Convert.ToInt32(double) 将.如果值超出范围,则强制转换的结果(在未经检查的上下文中)显式未定义.

Don't forget that the range of int is much smaller than the range of double. A cast from double to int won't throw an exception if the value is outside the range of int in an unchecked context, whereas a call to Convert.ToInt32(double) will. The result of the cast (in an unchecked context) is explicitly undefined if the value is outside the range.

这篇关于将 double 转换为 int的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

查看全文
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆