strnset, wcsnset

These POSIX functions are deprecated. Use the ISO C++ conformant _strnset, _strnset_l, _wcsnset, _wcsnset_l, _mbsnset, _mbsnset_l or security-enhanced _strnset_s, _strnset_s_l, _wcsnset_s, _wcsnset_s_l, _mbsnset_s, _mbsnset_s_l instead.