是F（无效）德$ P $在现代的C和C ++ pcated [英] is f(void) deprecated in modern C and C++

问题描述

我目前正在重构/整理在C ++项目中使用的一些旧的C code和定期看功能，例如：

I'm currently refactoring/tidying up some old C code used in a C++ project, and regularly see functions such as:

int f(void)

我往往会为写：

int f()

是否有任何理由不更换（无效）和（）在整个codeBase的，以提高一致性，或者是有，我不知道两者之间的细微差别？更具体地，如果C ++中的虚拟成员函​​数被描述为：

Is there any reason not to replace (void) with () throughout the codebase in order to improve consistency, or is there a subtle difference between the two that I am unaware of? More specifically, if a virtual member function in C++ is described as:

virtual int f(void)

和派生类包含一个成员函数：

and a derived class includes a member function:

int f()

这是一个有效的覆盖？另外，我很可能会遇到的基础上几乎相同签名的任何连接问题？

is this a valid override? Additionally, am I likely to encounter any linker problems based on almost identical signatures?

推荐答案

在C，声明 INT F（无效）表示函数返回int不带参数。声明 INT F（）表示函数返回int可以接收任意数量的参数。因此，如果你有一个函数，C中没有参数，前者是正确的雏形。

In C, the declaration int f(void) means a function returning int that takes no parameters. The declaration int f() means a function returning int that takes any number of parameters. Thus, if you have a function that takes no parameters in C, the former is the correct prototype.

在C ++中，我相信 INT F（无效）是德precated和 INT F（）为preferred，因为它具体是指一个函数，没有参数。

In C++, I believe int f(void) is deprecated, and int f() is preferred, as it specifically means a function that takes no parameters.

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