You need a library of some kind, because you have to call the system to find out if a directory exists, and those APIs are in libraries, not a part of C or C. The correct way is to use the stat system call. Following code will set isDir to 1 if it is a directory, or 0 otherwise. Jan 17, 2019  This is solution video for Dev C IDE to handle the error of library directories don't exist. 'C:Program FilesDev-CppMinGW64lib32'. Create a directory for -out-dir if it does not already exist Currently if `-out-dir` is set to a non-existent directory, the compiler will throw unfriendly messages like `error: could not write output to subdir/example.crate.allocator.rcgu.o: No such file or directory`, which, while not completely unreadable, isn’t very user-friendly either.

Sep 22, 2017 Description GitHub Desktop says “Can't find 'gecko-dev'” “It was last seen at C: Users Patrick Dark Documents GitHub Repositories gecko-dev ” with “Locate”, “Clone”, and “Remove” buttons after syncing a repository with the online versio. Sep 08, 2012  It took away the warning and still compiles, but still no directory is created. Hopefully, it doesn't make a difference, but I'm using MS Visual C 2008 Express. Time passes while I try new things. Okay, now it works. I made one small change to your code above. The Most Secure Program Is One That Doesn’t Exist. Like Bookmarks. QCon empowers software development by facilitating the spread of knowledge and innovation in the developer community.

If you want to create a directory, you can call the mkdir function. If the function can create the directory for you, it returns a 0. Otherwise it returns a nonzero value. (When you run it you get a –1, but your best bet — always — is to test it against 0.)

Here’s some sample code (found in the MakeDirectory example) that uses this function:

Notice (as usual) that you used a forward slash (/) in the call to mkdir. In Windows, you can use either a forward slash or a backslash. But if you use a backslash, you have to use two of them (as you normally would to get a backslash into a C++ string).

For the sake of portability, always use a forward slash. After you run this example, you should see a new directory named abc added to the /CPP_AIO/BookV/Chapter04Can i sell auto tune. directory on your system.

Dev C Says Directory Doesn't Exist But Its Linked Email

It would be nice to create an entire directory-tree structure in one fell swoop — doing a call such as mkdir(“/abc/def/ghi/jkl”) without having any of the abc, def, or ghi directories already existing. But alas, you can’t. The function won’t create a jkl directory unless the /abc/def/ghi directory exists. That means you have to break this call into multiple calls: First create /abc. Then create /abc/def, and so on.

If you do want to make all the directories at once, you can use the system() function. If you execute system(“mkdirabcdefghijkl”);, you will be able to make the directory in one fell swoop.

When you open a file, all kinds of things can go wrong. A file lives on a physical device — a fixed disk, for example, or perhaps on a flash drive or SD card — and you can run into problems when working with physical devices.

For example, part of the disk might be damaged, causing an existing file to become corrupted. Or, less disastrous, you might run out of disk space. Or, even less disastrous, you might try to open a file in a directory that doesn’t exist.

If you try to open a file for writing by specifying a full path and filename but the directory does not exist, the computer responds differently, depending on the operating system you’re using. If you’re unsure how your particular operating system will respond, try writing a simple test application that tries to create and open something like /abc/def/ghi/jkl/abc.txt. (Of course, you’ll want to be sure to use a directory that doesn’t exist.)

Then one of two things will happen: Either the directory and the file will get created, or nothing will happen.

For example, on a Windows system, if we attempt to create a file in a directory that doesn’t exist, the system does not create the directory. That’s because deep down inside, the application ultimately calls an operating system function that does the dirty work of creating the file. And this particular operating system function (it’s called CreateFile(), if you even care) has a rule that it will not create a directory for you.

If you want to determine whether the ostream class was unable to create a file, you can call its fail() member function. This function returns true if the object couldn’t create the file. And that’s what happens when a directory doesn’t exist. The DirectoryCheck01 example shown demonstrates an example of this.

When you run this code, assuming that you don’t have a directory called /abc/def/ghi on your system, you should see the message Couldn’t open the file! Assuming that your particular operating system doesn’t create a directory in this case; if it does, your computer will open the file, write Hi to it, and move on with its happy life after closing things out.

As an alternative to calling the fail() member function, you can use an operator available in various stream classes. This is !, fondly referred to as the “bang” operator, and you would use it in place of calling fail(), as in this code:

Dev C Says Directory Doesn't Exist But Its Linked Name

Most people prefer to use !outfile instead of outfile.fail(), although !outfile makes confusing code. The reason is that outfile is an object, and the notion of !outfile simply doesn’t make sense.

In fact, !outfile trips up many beginning programmers. They know that outfile is not a pointer in this sample code, and they wonder how you could test it against 0 as you normally can only do with a pointer. (Remember, by saying !x, where x is some pointer, you’re testing x against 0.) And that simply doesn’t make sense! And so, to avoid confusion, just call fail(). It makes more sense.

Here are some reasons your file creation may choke:

• The directory doesn’t exist.

• You’re out of disk space and out of luck.

• Your application doesn’t have the right permissions to create a file.

• The filename was invalid — that is, it contained characters the operating system doesn’t allow in a filename, such as * or ?.

Like any good application, your application should do two things:

1. /little-snitch-2017-discount.html. 1.Check whether a file creation succeeded.

2. 2.If the file creation failed, handle it appropriately.

   Don’t just print a horrible message like Oops!Aborting!, leaving your poor users with no choice but to toss the monitor onto the floor. Instead, do something friendlier — such as presenting a message telling them there’s a problem and suggesting that they might free more disk space.