在函数声明Static关键字可以在函数定义会丢失？ [英] Static keyword in function declaration can be missing in function definition?

问题描述

我想有我在.c文件中定义之前声明静态函数：

I want to have a static function which I declare in my .c file before defining it:

//file a.c version 1
static int foo();
...
static int foo()
{
...
}

不过，似乎我可以离开静态关键字出来的函数定义和我没有得到任何编译器警告......例如

However, it seems that I can leave the static keyword out of the function definition and I get no compiler warnings... e.g.

//file a.c version 2
static int foo();
...
int foo()
{
...
}

我在承担这两种形式是完全一样的正确吗？结果
如果是这样，为什么这种差异允许的，我应该使用哪种形式？

Am I correct in assuming these two forms are exactly the same?
If so, why is this discrepancy allowed and which form should I use?

推荐答案

是7.1.1 / 6

Yes 7.1.1/6

没有的存储类说明符在命名空间范围内声明的名称的有外部链接，除非它有因为previous声明的内部连接，并提供其未声明常量。

A name declared in a namespace scope without a storage-class-specifier has external linkage unless it has internal linkage because of a previous declaration and provided it is not declared const.

另见的例子7.1.1 / 7

See also the examples of 7.1.1/7

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