c++写文件

#include <Windows.h> 
#include <iostream> 
#include <tchar.h> 
  
int main() 
{ 
    FILE *fp; 
    fp = _tfopen(_T("d:\\sss.ini"), _T("w")); 
    //if (fp == NULL) 
    //{ 
    //    fp=_tfopen(_T("d:\\sss.ini"), _T("w+b")); 
    //     
    //    wchar_t m_strUnicode[1]; 
    //    m_strUnicode[0] = wchar_t(0XFEFF); 
    //    fputwc(*m_strUnicode,fp); 
    //} 
    wchar_t strUn[100]; 
    char * ptr="Hello"; 
    int count=MultiByteToWideChar(CP_ACP,0,ptr,-1,NULL,0); 
    wchar_t * wcA=new wchar_t[count]; 
    //MultiByteToWideChar(CP_ACP,0,ptr,-1,wcA,count); 
    MultiByteToWideChar(CP_UTF8, 0, ptr, count, wcA, count); 
    fputws(wcA,fp); 
    delete [] wcA; 
      
    fclose(fp); 
    return 0; 
};