From: deepblack AT geocities DOT com (Luis Coelho)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: ios::binary ignored by GCC - HELP!
Date: Sat, 07 Nov 1998 23:24:26 GMT
Organization: Instituto Superior Tecnico
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On Fri, 06 Nov 1998 20:36:14 -0500 (EST), "sl"
<sl AT psycode DOT com DOT REMOVE_THIS> uttered the following words:
>	When I open files in ios::binary mode, it is ignored by GCC. For
>example, writting "7" to a file opened with the binary flag should write the
>7th ASCII character. Instead, the file contains the text-character "7".. How
>does one go about fixing this?
>
>Gili

Are you using something such as

ofstream fout("filename.dat", ios::binary);
int the_int = 7;

fout << the_int << 42;

?

operator<< *Always* outputs a character representation of its
second argument. To output integrers in binary, you must use
write(). So the example above becomes:

fout.write(static_cast<char*>(&the_int),sizeof(int));

Hope that helped,
Luís Coelho.

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