Differences Between QDir::currentPath(), QCoreApplication::applicationDirPath(), and QCoreApplication::applicationFilePath() in Qt

QDir::currentPath():

• QDir::currentPath() returns the current working directory of the application.
• The working directory is the directory in which the application is running, typically the directory containing the executable file.
• This path can be either a relative or an absolute path, depending on where the application was launched from.

QCoreApplication::applicationDirPath():

• QCoreApplication::applicationDirPath() returns the directory containing the application’s executable file.
• This path represents the installation directory of the application, typically containing the application’s executable file and possibly other resource files.
• This path is typically an absolute path.

QCoreApplication::applicationFilePath():

• QCoreApplication::applicationFilePath() returns the complete path to the application’s executable file, including the filename.
• This path represents the full path to the application’s executable file, including the filename.
• This path is typically an absolute path.

In summary:

• currentPath() returns the working directory, which can be either a relative or an absolute path.
• applicationDirPath() returns the installation directory of the application, typically an absolute path.
• applicationFilePath() returns the complete path to the application’s executable file, typically an absolute path.

Choose the appropriate function based on your needs to obtain path information. If you need to access resource files or configuration files related to the application, you would typically use applicationDirPath() or applicationFilePath() to obtain the directory or path of the executable file. If you need to work with relative paths or files related to the current working directory, you can use currentPath().