is this correct??

[pkm]

In test.hpp
...
..
typedef struct _test_
{
...
...
} test
class test
{
...
private:
static test* infoP_m;
...
};

in test.cpp file
...
...
//static member initialization
test* infoP_m = 0;

//constructor
test::test()
{
memset(&infoP_m,0,sizeof(infoP_m); // Is this correct
...
}

do I need to instancitate the infoP_m structure (to allocate memory, or it is already allocated ??)
thanks
-pkm

[Banfa]

This

typedef struct _test_
{
...
...
} test
 

can be this (note the added ; )

struct test
{
...
...
};
 

This

class test
{
...
private:
    static test* infoP_m;
...
};
 

should have a non-conflicting name like this

class ctest
{
...
private:
static test* infoP_m;
...
};
 

This

//static member initialization
test* infoP_m = 0;
 

should be this (otherwise you have just declared a global pointer not a static class member)

//static member initialization
test *ctest::infoP_m = 0;
 

This

//constructor
ctest::ctest()
{
    memset(&infoP_m,0,sizeof(infoP_m); // Is this correct
...
}
 

Is poor style, every time you construct a class of type ctest you set the pointer to NULL, also it can be written more clearly as

//constructor
ctest::ctest()
{
    infoP_m = 0; // Is this correct
...
}
 

do I need to instancitate the infoP_m structure (to allocate memory, or it is already allocated ??)

There is no infoP_m structure, it is a pointer and yes you do need to allocate memory to that pointer before you try and use what it points to.

[pkm]

that was very helpful..thank you..
Regards
-Pkm