Randomaccessfile updating

Posted by / 19-Apr-2018 21:08

If this fails (the file might exist and be open or read only or there could be a fault with the filename), then it returns 0.The fopen() command attempts to open the specified file.Although you could just check for ft being non-zero (success), this example has a File Success() function to do this explicitly.On Windows, it outputs the success/failure of the call and the filename.Of these two, binary files are usually the simpler to deal with.For that reason and the fact that random access on a text file isn't something you need to do often, this tutorial is limited to binary files.It's a little onerous if you are after performance, so you might limit this to debugging.

The two fundamental file types are text and binary.With random access, you can read or write to any part of the file or stream.With sequential access, you have to loop through the file or stream from the start like a big tape.The only way to get to a point on the tape was by reading all the way through the tape.Then disks came along and now you can read any part of a file directly.

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The file is created if it doesn't exist, and if it does, whatever was in it is deleted.

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