std::erase issue with WCHAR

[bobster99]

Is there a way to ignore the first character, when using the command below?

I just want to get rid of the "\" that is at the beginning of szLnk.


int wmain(int argc, const WCHAR *argv[])
{
....

WCHAR szLnk[1024];

_snwprintf_s(szLnk, sizeof(szLnk), wcschr((const wchar_t*)argv[3], L'\\'));

szLnk.erase(0,1); <- throws "expression must have class type" error

....

}


Any ideas?

[Repeater]

szLnk is an array of WChar. Arrays do not have member functions, so it does not have an erase member function.

This might work for you:

int wmain(int argc, const WCHAR *argv[])
{
  ....

  WCHAR szLnk[1024];

  _snwprintf_s(szLnk, sizeof(szLnk), wcschr((const wchar_t*)argv[3], L'\\'));

  szLnk++; // now, szLnk is pointing at the SECOND wchar in the array. 
  ....

}

or you could change your _snwprintf_s function call so that you don't start from the beginning of the array you're copying, but skip the first character to begin with.

Or create another array, WCHAR szLnk2[1024];, and copy into it everything except the first character:

int wmain(int argc, const WCHAR *argv[])
{
  ....

  WCHAR szLnk[1024];

  _snwprintf_s(szLnk, sizeof(szLnk), wcschr((const wchar_t*)argv[3], L'\\'));

  WCHAR szLnk2[1024];

  for (int i = 1; i < 1024; ++i)
  {
    szLnk2[i-1]= szLnk[i];
  }


}

Lots of options. The big mistake you're making is thinking that szLnk is some kind of C++ object with member functions like erase. It isn't. It's a plain array.

[bobster99]

I'm not very familiar with the "_snwprintf_s" function call, do you have a sample of how to do what you suggested?

".. change your _snwprintf_s function call so that you don't start from the beginning .."

I tried this, but it didn't work;

_snwprintf_s(szLnk, sizeof(szLnk)-1, wcschr((const wchar_t*)argv[3], L'\\'));

[tpb]

@Repeater, You can't increment an array name. And _snwprintf_s needs the size in words (not chars/bytes). So maybe something like:

    WCHAR lnk[1024];
    auto p = wcschr(argv[3], L'\\');
    if (!p) { /* error: no backslash in third argument */ }
    _snwprintf_s(lnk, sizeof lnk / sizeof lnk[0], p + 1);

[Repeater]

Yeah, blah blah, make a pointer to it and increment that.

[tpb]

Repeater wrote:

Yeah, blah blah, make a pointer to it and increment that.

Duh, details don't matter in programming, duh!
Your answer was crap.
Period.

[Repeater]

Suck it up, tpb.

[bobster99]

@tpb, works like a charm man!

Many thanks!

[tpb]

Repeater wrote:

Suck it up, tpb.

I suggest you hide in the corner and sob for a little while, baby.

[Repeater]

Now tell me you're a navy seal and you're going to track me down, but do it by private mail so nobody else has to put up with it. I won't read it, but you'll feel better.

[tpb]

Whine, whine, whine. Whimper elsewhere, child.