Are all variables in a static function static by default?

Question

static void Foo()
{
    int bar = 0;
}

Is bar static by default? What does the Standard say about this?

+3

Dyzzet 03 June 15 at 19:32

2 answers

Jonathan Mee · Answer 1 · 2015-06-03T19:38:33+0000

No, the only condition for creating a static variable in C ++ is the static

keyword .

For example, if you change Foo

to:

static void Foo()
{
    int bar = 0;

    bar++;
    cout << bar << endl;
}

And then call:

Foo();
Foo();

Since bar

it is not static, the output will be:

1
1

If you declare bar

like static

this:

static void Foo()
{
    static int bar = 0;

    bar++;
    cout << bar << endl;
}

In fact, your output will be:

1
2

dasblinkenlight · Answer 2 · 2015-06-03T19:38:50+0000

No, variables inside static functions are allocated in automatic storage by default.

static

functions and variables static

are orthogonal concepts that are used to reuse the same keyword in C and C ++ syntax

Function execution static

tells the compiler to hide it from functions defined in other translation units
Creating a variable static

tells the compiler to place the data for that variable in static storage.

Usage static

for functions has nothing to do with static storage.