C ++中的静态全局标识符和非静态全局标识符有什么区别？

Question

是什么区别static全局和非static的C ++全局标识符？

Answer 1

Static limits the scope of the variable to the same translation unit .
A static global variable has internal linkage .
A non-static global variable has external linkage .

Good Read:
What is external linkage and internal linkage?

Answer 2

全局static变量仅在变量所在的转换单元 （即源文件）中可用。可以从其他源文件引用非静态全局变量。

Answer 3

If you don't know what the difference is, correct answer will probably be even more confusing to you. In short, static s of a class aren't realted to statics at file scope. Statics of a class are esentially identical to regular variables, but they will have to be referenced by prefixing them with class name. Statics at file scope are regular variables that are local to the file only. To understand what that means, try to add two variables with the same name into a single project. You will get linker errors because there are multiple identical symbols. By making symbols static you will avoid that problems and variable's name won't be accessible from outside the file.

Answer 4

全局非静态变量可从其他文件访问，而静态全局变量则不可访问