Two different methods are used to import header files.

Two different methods are used to import header files.

There are two different ways to import a header file: use quotation marks or use angle brackets. For example, # import <Cocoa/Cocoa. h> and # import "Tire. h ". the statements with Angle brackets are used to import system files, while the statements with quotation marks indicate that the local project header file is imported. If the header file name you see is enclosed in angle brackets, the header file is read-only for your project because it belongs to the system. If the header file name is enclosed in quotation marks, you (or others involved in this project) can edit it.