std::wcscat(3)

NAME
std::wcscat - std::wcscat

Synopsis
   Defined in header <cwchar>
   wchar_t* wcscat( wchar_t* dest, const wchar_t* src );
   Appends a copy of the wide string pointed to by src to the end of the wide string
   pointed to by dest. The wide character src[0] replaces the null terminator at the
   end of dest. The resulting wide string is null-terminated.
   The behavior is undefined if the destination array is not large enough for the
   contents of both src and dest and the terminating null wide character.
   The behavior is undefined if the strings overlap.

Parameters
   dest - pointer to the null-terminated wide string to append to
   src - pointer to the null-terminated wide string to copy from

Return value
   Returns a copy of dest.

Example
// Run this code
 #include <clocale>
 #include <cwchar>
 #include <iostream>
 int main(void)
 {
     wchar_t str[50] = L"Земля, прощай.";
     std::wcscat(str, L" ");
     std::wcscat(str, L"В добрый путь.");
     std::setlocale(LC_ALL, "en_US.utf8");
     std::wcout.imbue(std::locale("en_US.utf8"));
     std::wcout << str << '\n';
 }

Possible output:
 Земля, прощай. В добрый путь.

See also
   wcsncat appends a certain amount of wide characters from one wide string to another
           (function)
   strcat concatenates two strings
           (function)
   wcscpy copies one wide string to another
           (function)
   C documentation for
   wcscat