Input and Output

 

For the latest documentation on Visual Studio 2017, see Visual Studio 2017 Documentation.

For the latest documentation on Visual Studio 2017, see Input and Output on docs.microsoft.com. The I/O functions read and write data to and from files and devices. File I/O operations take place in text mode or binary mode. The Microsoft run-time library has three types of I/O functions:

  • Stream I/O functions treat data as a stream of individual characters.

  • Low-level I/O functions invoke the operating system directly for lower-level operation than that provided by stream I/O.

  • Console and port I/O functions read or write directly to a console (keyboard and screen) or an I/O port (such as a printer port).

    System_CAPS_ICON_note.jpg Note

    Because stream functions are buffered and low-level functions are not, these two types of functions are generally incompatible. For processing a particular file, use either stream or low-level functions exclusively.

Run-Time Routines by Category

Show: