转换Windows SYSTEMTIME为字符串或字符buf在C++与用户的“地区和语言”格式？

int GetDateFormat(
  LCID       Locale,
  DWORD      dwFlags,
  const SYSTEMTIME *lpDate,
  LPCWSTR    lpFormat,
  LPWSTR     lpDateStr,
  int        cchDate
);

#include <iostream>
#include <Windows.h>

int main()
{
    SYSTEMTIME sysTime;
    GetLocalTime(&sysTime); // 获取当前系统时间

    wchar_t dateStr[100];
    GetDateFormat(LOCALE_USER_DEFAULT, DATE_SHORTDATE, &sysTime, L"yyyy-MM-dd", dateStr, 100);

    std::wcout << dateStr << std::endl;

    return 0;
}

int GetTimeFormat(
  LCID       Locale,
  DWORD      dwFlags,
  const SYSTEMTIME *lpTime,
  LPCWSTR    lpFormat,
  LPWSTR     lpTimeStr,
  int        cchTime
);

#include <iostream>
#include <Windows.h>

int main()
{
    SYSTEMTIME sysTime;
    GetLocalTime(&sysTime); // 获取当前系统时间

    wchar_t timeStr[100];
    GetTimeFormat(LOCALE_USER_DEFAULT, 0, &sysTime, L"HH:mm:ss", timeStr, 100);

    std::wcout << timeStr << std::endl;

    return 0;
}