what will be the size of the class & Object ?

[Matrixinline]

Hi All,
I know I am asking a dumb question but can you Please let me know
what should be the size of the class & its object? will the Objects
size will be different?

class Product
{
string m_sItem;
string m_sIteFile;
char m_oName[128]
map<string, string> m_oSubItem;
map<string, string> m_oLocalItem;
};

Product oProduct;


sizeof(oProduct)==sizeof(Product) ?? is this will be true?
If I calculate sizeof(Product) will this give me different anwser on
different system?


Thanks
Anup

 

[yanlinlin]

Hi All,
I know I am asking a dumb question but can you Please let me know
what should be the size of the class & its object? will the Objects
size will be different?

class Product
{
string m_sItem;
string m_sIteFile;
char m_oName[128]
map<string, string> m_oSubItem;
map<string, string> m_oLocalItem;

};

Product oProduct;

sizeof(oProduct)==sizeof(Product) ?? is this will be true? yes.

If I calculate sizeof(Product) will this give me different anwser on
different system? maybe.


Thanks
Anup

 

[Erik Wikström]

Hi All,
I know I am asking a dumb question but can you Please let me know
what should be the size of the class & its object? will the Objects
size will be different?

class Product
{
string m_sItem;
string m_sIteFile;
char m_oName[128]
map<string, string> m_oSubItem;
map<string, string> m_oLocalItem;
};

Product oProduct;


sizeof(oProduct)==sizeof(Product) ?? is this will be true?
Yes.

If I calculate sizeof(Product) will this give me different anwser on
different system?

Actually, you do not have to use a different system, just changing some
compiler options might suffice.

 

[Rahul]

class Product
{
string m_sItem;
string m_sIteFile;
char m_oName[128]

// ; missing, compilation error

map<string, string> m_oSubItem;

and what is this type?

 

[Salt_Peter]

class Product
{
string m_sItem;
string m_sIteFile;
char m_oName[128]

// ; missing, compilation error

map<string, string> m_oSubItem;

and what is this type?

map<string, string> m_oLocalItem;

Its a sequenced container, this std::map stores std::string pairs.
These pairs are ordered upon insertion using a default predicate
(less< key >)
or any comparator you choose to provide.

of course, you need
#include <map>

std::map< key, value_type > m;

You might consider reviewing std::set, std::multiset as well as
std::multimap too.