Question

#ifndef UNICODE
#define UNICODE
#endif

#include <Windows.h>
#include <cstdio>
#include <fstream>

using namespace std;

int main()
{
    FILE* resFile;
    char multiByteStr[256];
    ifstream oFile;
    FILE* exampleFile;
    TCHAR buffer[256];      
    system("chcp 65001");

    resFile = _wfopen(L"foo",L"w, ccs=UTF-8");             
    fwprintf(resFile,L"%s",L"C:\\exsistingFolder\\zażółć gęśłą jaźń ☺☻♥♦• ć.txt");    
    fclose(resFile);   

    oFile.open(L"foo");    
    oFile.getline(multiByteStr,256,'\n');       
    oFile.close();    

    MultiByteToWideChar(CP_UTF8,0,multiByteStr,256,buffer,256);    
    wprintf(L"%s",buffer);

    exampleFile = _wfopen(buffer,L"w, ccs=UTF-16LE");       
    fwprintf(exampleFile,L"%s",buffer);     
    fclose(exampleFile);

    system("pause");
    return 0;
}

As you can see, program should create file “foo” resFile that contains a full path of the file to be created, and this new file exampleFile should contain a path to itself. Although during debugging in Visual studio 2010 autos yields that buffer has the correct string, exampleFile isn’t created. Why?
And another thing: why wprintf doesn’t output extended characters, though I’ve switched console’s font to Lucida Console – that one which can deal with uncode characters.

Ps. exampleFile points to NULL, even after _wfopen, and the last character of buffer is '/0'.

Answer 1

The solution is very trivial- _wfopen creates a file encoded in UTF-8 with BOM, and MultiByteToWideChar function doesn’t remove the BOM, so we need to manually get rid of this.