这是什么？在读取用Unicode编码的文本文件后,在控制台输出的开头？

Question

这是什么？在读取用Unicode编码的文本文件后,在控制台输出的开头？

我一直在修补读取文件(用Unicode编码的文本文件),出于某种原因,我在输出的开头有一个问号.

这是代码.

#include <iostream>

#include <Windows.h>
#include <fcntl.h>
#include <io.h>

int main(void)
{
    HANDLE hFile = CreateFile(L"dog.txt",
                              GENERIC_READ,
                              NULL,
                              NULL,
                              OPEN_EXISTING,
                              FILE_ATTRIBUTE_NORMAL,
                              NULL);

    _setmode(_fileno(stdout), _O_U16TEXT); //Making sure the console will 
                                           //display the  wide characters 
                                           //correctly. See below for link

    LARGE_INTEGER li;
    GetFileSizeEx(hFile,&li); 

    WCHAR* pBuf = new WCHAR[li.QuadPart / sizeof(WCHAR)]; //Allocating space for 
                                                          //the file.

    DWORD dwRead = 0;
    BOOL bFinishRead = FALSE;
    do
    {
        bFinishRead = ReadFile(hFile,pBuf,li.QuadPart,&dwRead,NULL);
    } while(!bFinishRead);

    pBuf[li.QuadPart / sizeof(WCHAR)] = 0; //Making sure the end of the output 
                                           //is null-terminated.

    std::wcout << pBuf << std::endl;

    std::cin.get();

    return 1;
}

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dog.txt