当全局命名空间中的函数声明为静态C ++时，是什么意思？ [英] What does it mean when the function in global namespace is declared as static C++?

问题描述

可能重复：

什么是静态函数？

我在全局命名空间中看到一个函数， this：

I have seen a function in a global namespace that is declared like this:

static int function_name(int a, double* p, int c, float * u)
{
     //do something with these arguments
}

？

编辑：现在当我知道什么是静态时，请解释什么优点给了一个函数的限制在文件只有声明它是可见的？

Now when I know what is for static, please explain what advantage gives the restriction of a function to be visible in a file only where it is declared? I mean why I should restrict my function visibility, what it gives to me?

推荐答案

您将使用范围的静态函数在编译单元中，当你真的想要该名称的函数只在编译单元内部是已知的。不在该范围内的类或函数不能意外调用该函数。 （我会把这个在评论，但我没有那个权限）

You would use a static function with the scope in the compilation unit when you really want the function with that name to be known only inside that compilation unit. A class or function that is not in that scope cannot accidentally call the function. (I'd have put this in a comment but I don't have privileges for that yet)

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