Outputting 'wchar_t*' to an 'ofstream'

Question

I want to output a text to a file via two pointers that I have declared:

wchar_t   *Col1="dsffsd", *Col2="sdfsf";

Here is what I have tried:

std::ofstream fout;
fout.open(NativeDatabasePathHist);
fout<<"testing";
fout<<" "<<Col1<<" "<<Col2;
fout.close();

And here is what I am getting:

testing 113 113

Why is it that when I print Col1 and Col2, I am getting numbers instead of strings?

That shouldn't output anything since those literals aren't wide. Anyway, you probably want `std::owfstream` if you are indeed using wide strings. — chris, Oct 15 '12 at 04:45
Related question: http://stackoverflow.com/questions/2493785/how-i-can-print-the-wchar-t-values-to-console — jogojapan, Oct 15 '12 at 05:07
Thanks chris your comment was helpful but you write `std::owfstream` instead of `std::wofstream` :) — Aan, Oct 15 '12 at 05:26
•Try ```WideCharToMultiByte``` to convert your unicode text into binary. — Supergamer, Oct 02 '22 at 14:47

score 22 · Accepted Answer · edited Apr 15 '15 at 17:22

22

First, use std::wofstream instead of std::ofstream.

Also, use the L prefix on your text string to indicate that your text is wide character text:

wchar_t   *Col1=L"dsffsd"

edited Apr 15 '15 at 17:22

DavidRR

answered Feb 13 '13 at 09:52

Dmitriy

score 0 · Answer 2 · answered Oct 15 '12 at 04:45

0

Since you have written it using wide characters (wchar_t), you need to look at the resulting file with something that understands wide characters.

answered Oct 15 '12 at 04:45

wallyk

I have to get `Col1` & `Col2` as `wchar_t`. How I can convert it to char? – Aan Oct 15 '12 at 04:51
@Aan: well, since those strings don't have any characters actually requiring a wide representation, you could simply change the type to `char`. If this is an example using dummy data, but real data will have 16-bit code points, then use a library function like `wctomb()` ("wide character to multi-byte"). – wallyk Oct 15 '12 at 05:12
In this case I tried `fout<<" "<<(char*)Col1<<" "<<(char*)Col2;` but this output the first character pointed by Col1 & Col2 ?? – Aan Oct 15 '12 at 05:17
@Aan: sorry, I meant change the first line to `char *Col1="dsffsd", *Col2="sdfsf";` – wallyk Oct 15 '12 at 05:18

2 Answers2