浮点值的后缀“f"有什么用 [英] What's the use of suffix `f` on float value

问题描述

我想知道C中这两个变量有什么区别:

I am wondering what the difference is between these two variables in C:

float price = 3.00;

和

float price = 3.00f;

这种情况下后缀f有什么用?

What is the use of suffix f in this case?

推荐答案

3.00 被解释为 double，而不是 3.00f编译器将其视为 float.

3.00 is interpreted as a double, as opposed to 3.00f which is seen by the compiler as a float.

f 后缀只是告诉编译器哪个是float，哪个是double.

The f suffix simply tells the compiler which is a float and which is a double.

请参阅 MSDN (C++)

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