Simple Pointer issue

[JPatchSPSU]

Hello,

New to c++ and windows programming.

int Current_Amount_Of_Groups = 1;
wchar_t *Group_Name = "Name";

a) wchar_t buf[30];

b) wchar_t *buf= new wchar_t[30];

swprintf_s( buf, 30, L"%i", Current_Amount_Of_Groups );
wcsncat_s( buf, Group_Name),10);

When I use a) the wsprintf_s and wcsncat_s functions work fine, but when I use b) the swprintf_s works and wcsncat_s does not.

My issue:
I thought by using a) and inputting buf to wcsncat_s was inputting a pointer to an array. So why am I having an issue using b) by inputting a pointer to an array? see my problem?

P.S compiler says: No Instance of overloaded function "wcsncat_s" matches the argument list.

[Marc G]

Just like the compiler said, there is no version of wcsncat_s that accepts those arguments. You have the following 2 versions:

errno_t wcsncat_s(
   wchar_t *strDest,
   size_t numberOfElements,
   const wchar_t *strSource,
   size_t count 
);

and

template <size_t size>
errno_t wcsncat_s(
   wchar_t (&strDest)[size],
   const wchar_t *strSource,
   size_t count 
);

You are trying to use the second version, but that only works with array defined at compile time.
For your dynamic array, you need to use the first version.

On a side note: If you are new to C++ programming, I would highly recommend to forget about those C-style ways of working with strings and switch to the C++ style of doing strings Use classes like std::string and std::stringstream.

[ovidiucucu]

A note aside the Marc side note .
You can also use CString in any console or Windows application.
Simply include <atlstr.h> then enjoy.

[JPatchSPSU]

I appreciate all the responses and I will look into all these options. thanks again