std::wcslen (3) - Linux Manuals

std::wcslen: std::wcslen


std::wcslen - std::wcslen


Defined in header <cwchar>
std::size_t wcslen( const wchar_t* str );

Returns the length of a wide string, that is the number of non-null wide characters that precede the terminating null wide character.
The behavior is undefined if there is no null character in the wide character array pointed to by str.


str - pointer to the null-terminated wide string to be examined

Return value

The length of the null-terminated wide string str.


// Run this code

  #include <iostream>
  #include <cwchar>
  #include <clocale>

  int main()
      const wchar_t* str = L"爆ぜろリアル!弾けろシナプス!パニッシュメントディス、ワールド!";

      std::setlocale(LC_ALL, "en_US.utf8");
      std::wcout << "The length of \"" << str << "\" is " << std::wcslen(str) << '\n';


  The length of "爆ぜろリアル!弾けろシナプス!パニッシュメントディス、ワールド!" is 32

See also

       returns the length of a given string
strlen (function)
       returns the number of bytes in the next multibyte character
mblen (function)