why does copy not work?

[Bruce Mac]

Hi all to all.

first post here on the scripts

Maybe someone could explain this to me, why is it that if i open two streams

ifstream in ("some_doc.txt");
ofstream out ("copy_of_some_doc.txt")

to 2 txt documents and use

string lines;
while(getline, in) {
in>> line;
out<< line << endl;
}
in.close();
out.close();

i can copy line by line of some_doc to a string, then write the string to the ofstream and it will copy the txt doc exactly line by line to the new doc, copy_of_some_doc.

now my question is, if i use the exact same code but point the istream to a jpeg, ie ("some_image.jpg") and the ofstream ("copy_of_some_image.jpg"), why does the program not copy the image? when i drag a jpg to my txt editor, it is just a series of lines of characters, surely the streams should just copy them, or am i missing something? why do i not get a copy of the image?

Thanks
bruce

[horace1]

if you are reading/writing non text files you should binary IO, see binary files in
http://www.cplusplus.com/doc/tutorial/files.html

[Bruce Mac]

Thank you.

sorted...