CODEWITHSUNDEEP
c++staticglobal-variablesidentifier
Fahad Siddiqui
Fahad Siddiqui

Reputation: 1849

What is the difference between static global and non-static global identifier in C++?

What is the difference between static global and non-static global identifier in C++?

Upvotes: 37

Views: 17091

Answers (4)

eric
eric

Reputation: 39

If you don't know what the difference is, correct answer will probably be even more confusing to you. In short, statics 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.

Upvotes: 3

Rahul Tripathi
Rahul Tripathi

Reputation: 172378

Global Non static variables are accessable from other files whereas static global variables are not

Upvotes: 3

Some programmer dude
Some programmer dude

Reputation: 409156

A global static variable is only available in the translation unit (i.e. source file) the variable is in. A non-static global variable can be referenced from other source files.

Upvotes: 12

Alok Save
Alok Save

Reputation: 206508

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?

Upvotes: 39

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