does value-initialization happen for global and local static object ?

[subramanian100in]

Suppose I have

#include <cstdlib>
#include <iostream>

using namespace std;

class Test
{
public:
int i;
double d;
char* str;
};

Test obj;

int main()
{
static Test one;
return EXIT_SUCCESS;
}

Will the global 'Test obj' and the local static 'Test one' be value-
initialized ?
What does the C++ standard say in this regard ?

Kindly clarify.

Thanks
V.Subramanian

[Alf P. Steinbach]

* su************* *@yahoo.com, India:

Suppose I have

#include <cstdlib>
#include <iostream>

using namespace std;

class Test
{
public:
int i;
double d;
char* str;
};

Test obj;

int main()
{
static Test one;
return EXIT_SUCCESS;
}

Will the global 'Test obj' and the local static 'Test one' be value-
initialized ?
What does the C++ standard say in this regard ?

They're zero-initialized.

This happens before any dynamic initialization.
Cheers, & hth.,

- Alf

[subramanian100in]

On Apr 20, 1:43 am, "Alf P. Steinbach" <[e-mail] wrote:

* subramanian10.. [e-mail], India:

They're zero-initialized.

This happens before any dynamic initialization.

Cheers, & hth.,

- Alf

Is zero-initialization different from value_initializ ation ?

What is meant by dynamic initialization ?

Kindly explain ?

Thanks
V.Subramanian

[Alf P. Steinbach]

* su************* *@yahoo.com, India:

On Apr 20, 1:43 am, "Alf P. Steinbach" <[e-mail] wrote:

>* subramanian10.. [e-mail], India:

They're zero-initialized.

This happens before any dynamic initialization.

Cheers, & hth.,

- Alf

Is zero-initialization different from value_initializ ation ?

In the general case, yes. Value initialization reduces to zero initialization
for POD (Plain Old Data) types.

What is meant by dynamic initialization ?

Initialization that requires function calls, e.g. of constructors.
Cheers, & hth.,

- Alf

[subramanian100in]

On Apr 20, 11:25 pm, "Alf P. Steinbach" <[e-mail] wrote:

* subramanian10.. [e-mail], India:

On Apr 20, 1:43 am, "Alf P. Steinbach" <[e-mail] wrote:

* subramanian10.. [e-mail], India:

Is zero-initialization different from value_initializ ation ?

In the general case, yes. Value initialization reduces to zero initialization
for POD (Plain Old Data) types.

Please give me an example where zero-initialization is different from
value_initializ ation.

By value-initialization, I understand that all arithmetic type data
members will be set to zero, the pointer type data members will be set
to null pointer and for class type data object members, the
corresponding default ctor, if present, will be called(if default ctor
for the member object is not present, then the above process goes
recursively.)

Is my understanding correct ?

Kindly explain.

Thanks
V.Subramanian