2.0和2.0F（显式浮动VS双面值）之间的差异

问题描述

我遇到了一些问题，这会让˚F旁边的文字值。我知道它定义为一个浮动但我真的需要吗？
难道这 2.0F * 2.0F 任何更快或编译比有什么不同2.0 * 2.0 ？就像声明浮动= 2.0; 比编译不同的浮动= 2.0F;

I had some questions about putting f next to literal values. I know it defines it as a float but do I really need it? Is this 2.0f * 2.0f any faster or compiled any different than 2.0 * 2.0? Is a statement like float a = 2.0; compiled differently than float a = 2.0f;?

推荐答案

我是很少左右的速度（至少直接地），但事实证明，否则编译器会发出警告转换双击到浮动。

I's rarely about speed (at least directly), but the fact that otherwise the compiler will warn about converting double to float.

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