Ask about how to create log file

Now I use Visual C++ 6.0 and I want to create log file which I can write some message in it and after creating that log file cannot edit text in it (not like file .txt which can edit text after creating). Do you know where can I find library or ? If you know how to solve my problem, please tell me.


Thank you for your kind.

you could just give it a odd file name that wouldn't associate with anything else. your program would still know it is a ASCII file but the other people would have no idea what to assoiate it with.
Or you could specify it as read only. I am not entirly sure how to do this though. With the first one i suggested it would take either luck or a real smart person to try to open it up in a txt editor. the second one is easyly disabled though

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you could just give it a odd file name that wouldn't associate with anything else. your program would still know it is a ASCII file but the other people would have no idea what to assoiate it with.

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True, to some extent.

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Or you could specify it as read only. I am not entirly sure how to do this though. With the first one i suggested it would take either luck or a real smart person to try to open it up in a txt editor. the second one is easyly disabled though

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The first option is still easy to "hack" with. Just double click on the file, and when the "Open With..." box appars, select either Notepad or Wordpad for windows. And if it comes up with stuff with funny little characters, it means it's hard to mess with (unless you use a hex-editor). But if you see readable stuff (like numbers and letters that look right), then it means it is able to be edited. I am not responsible if something happens with anything on your computer if you try my methods, but they are the best way to see if the file is editable.

You can use this method to set file attributes:

Code:

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#include <stdlib>
using std::system;

/*+ sets an attribute
- clears an attribute
R read-only file attribute.
A Archive File attribute.
S system File attribute
H hidden file attribute
/S processes all file in all directories in specified path*/

int main()
{
  system("attrib +R file.txt");
  return 0;
}

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write the log into STL strings, or some odd construct, then you could open a file as binary and save your std::strings into it. You know the contents of the file so you could read it... (or some real weak encryption (check out my xor encryption program here: http://www.cprogramming.com/source/jtxor.cpp)

you could modify that to meet your own needs :)