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How To Use C++ To Get And Set Current Directory On Windows

How To Use C++ To Get And Set Current Directory On Windows

C++ Builder has a lot of specific methods in its SysUtils library that are included in the vcl and fmx libraries. Some of these are grouped as Path Manipulation Routines that allow users to edit, extract, get and set drive name, directory name, file name, and file extensions. These methods are combined in Vcl.FileCtrl, System.IOUtils,  System.SysUtils libraries. These all methods are easy to use and easy to get or set file path strings in that operating system. These can be used with other component properties like the FileName property of OpenDialog, SaveDialog components. We can also check drives, files, or directories to see if they exist or not on a given path. We can also get some specific directory locations like “Current Directory”.

In tIn this post, you’ll learn what the term “current directory” means, how to get the current directory, how to use the GetCurrentDir method, and how to use the GetCurrentDirectory method in C++ software. By learning how to use GetCurrentDir and SetCurrentDir methods to get or to set Current Directory on Windows, it will help you to easily build C++ applications.

What are the C++ GetCurrentDir and SetCurrentDir methods?

Current Directory term is used for the active directory that our executable application is in it. On Windows, when your application runs, this Current Directory is the directory where your running application is. That means if you try to open a file this file should be in that folder or if you want to write a file this file will be created in that Current Directory. If you want to work on other directory you can use full path or you can change Current Directory by using SetCurrentDir() method.

GetCurrentDir Method (System::SysUtils::GetCurrentDir) is a SysUtils Method that returns the name of the current directory. It returns the fully qualified name as in String (UnicodeString) of the current directory.

SetCurrentDir Method (System::SysUtils::SetCurrentDir) is a SysUtils Method that sets the current directory. The return value is True if the current directory was successfully changed, or False if an error occurred.

What is the syntax of the C++ GetCurrentDir and SetCurrentDir methods?

Here is the Syntax of GetCurrentDir Method:

Here is the Syntax of SetCurrentDir() Method:

A simple example of using the C++ GetCurrentDirectory and SetCurrentDirectory methods

GetCurrentDir Method returns a UnicodeString, we can check a file and set the result to a bool as below,

We can use SetCurrentDir to set current directory to a path as in this example below

Here is a full example of how to use the C++ GetCurrentDir and SetCurrentDir methods

Here is the example how we check if a directory exists or not,

This is an example which uses the C++ GetCurrentDirectory and SetCurrentDirrectory methods

Note that there are GetCurrentDirectory (System.IOUtils.TDirectory.GetCurrentDirectory) and SetCurrentDirectory (System.IOUtils.TDirectory.SetCurrentDirectory) methods used as same above. Note that these methods doesn’t support UnicodeStrings. You must #include <IOUtils.hpp> and you must use TDirectory class name before these methods. We recommend you to use GetCurrentDir and SetCurrentDir methods which supports UnicodeStrings.

Here is a full C++ Builder example that uses both kinds,

C++ Builder is the easiest and fastest C and C++ IDE for building simple or professional applications on the Windows, MacOS, iOS & Android operating systems. It is also easy for beginners to learn with its wide range of samples, tutorials, help files, and LSP support for code. RAD Studio’s C++ Builder version comes with the award-winning VCL framework for high-performance native Windows apps and the powerful FireMonkey (FMX) framework for cross-platform UIs.

There is a free C++ Builder Community Edition for students, beginners, and startups; it can be downloaded from here. For professional developers, there are Professional, Architect, or Enterprise versions of C++ Builder and there is a trial version you can download from here.


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About author

Dr. Yilmaz Yoru has 33+ years of coding with more than 30+ programming languages, mostly C++ on Windows, Android, Mac-OS, iOS, Linux, and some other operating systems. He was born in 1974, Eskisehir-Turkey, started coding in college and graduated from the department of Mechanical Engineering of Eskisehir Osmangazi University in 1997. He worked as a research assistant at the same university for more than 10 years. He received his MSc and PhD degrees from the same department at the same university. Since 2012, he is the founder and CEO of Esenja LLC Company. He has married and he is a father of a son. Some of his interests are Programming, Thermodynamics, Fluid Mechanics, Artificial Intelligence, 2D & 3D Designs, and high-end innovations.
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