extern static bool?
If I have a global variable that is defined as
Normally I would use the
Background:
I have a file of 15,000 lines (written in a c-style) with hundreds of global variables that I am tasked with cleaning up. I've decided that my first step will be separating this monster into several files of a manageable size. I will remove the need for global variables later.
static bool MyLabel;, how would I add it to a header so that it can be accessed by multiple files?Normally I would use the
extern keyword in the header, but that doesn't work in combination with static as it gives the following errors in VS2008:MyFile.h(###) : error C2159: more than one storage class specified MyFile.cpp(###) : warning C4211: nonstandard extension used : redefined extern to static |
Background:
I have a file of 15,000 lines (written in a c-style) with hundreds of global variables that I am tasked with cleaning up. I've decided that my first step will be separating this monster into several files of a manageable size. I will remove the need for global variables later.
The
The
Hence
Take a look at this: http://en.wikipedia.org/wiki/Static_variable
extern keyword tells the compiler that this variable can be found (linked) somewhere within your program.The
static keyword makes a variable invisible for the linker.Hence
extern and static exclude each otherTake a look at this: http://en.wikipedia.org/wiki/Static_variable
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