定义在标准 C 库头 wchar.h传统上定义的宏。
#if <TRADITIONAL C HEADERS>
#include <wchar.h>
namespace std {
using ::btowc;
using ::fgetwc;
using ::fgetws;
using ::fputwc;
using ::fputws;
using ::fwide;
using ::fwprintf;
using ::fwscanf;
using ::getwc;
using ::getwchar;
using ::mbrlen;
using ::mbrtowc;
using ::mbsinit;
using ::mbsrtowcs;
using ::mbstate_t;
using ::putwc;
using ::putwchar;
using ::size_t;
using ::swprintf;
using ::swscanf;
using ::tm;
using ::ungetwc;
using ::vfwprintf;
using ::vswprintf;
using ::vwprintf;
using ::wcrtomb;
using ::wcscat;
using ::wcschr;
using ::wcscmp;
using ::wcscoll;
using ::wcscpy;
using ::wcscspn;
using ::wcsftime;
using ::wcslen;
using ::wcsncat;
using ::wcsncmp;
using ::wcsncpy;
using ::wcspbrk;
using ::wcsrchr;
using ::wcsrtombs;
using ::wcsspn;
using ::wcsstr;
using ::wcstod;
using ::wcstok;
using ::wcstol;
using ::wcstoul;
using ::wcsxfrm;
using ::wctob;
using ::wint_t;
using ::wmemchr;
using ::wmemcmp;
using ::wmemcpy;
using ::wmemmove;
using ::wmemset;
using ::wprintf;
using ::wscanf;
}
#endif
备注
将此头还确保声明的名称与在标准 C 库头的外部链接在 std 命名空间声明。此实现中，名称在全局命名空间也可能不会同时声明，根据特定转换环境。