The ANSI Standard Library assumes interactive console I/O (the stdin, stderr, and stdout streams) is always open. Many of the functions in this library were originally designed to be used on a character-oriented user interface, not the graphical user interface of a Macintosh computer. These header files contain functions that help you run character-oriented programs on a Macintosh:

• console.h declares ccommand(), which displays a dialog that lets you enter command-line arguments
• SIOUX.h is part of the SIOUX package, which creates a window that's much like a dumb terminal or TTY. Your program uses that window whenever your program refers to stdin, stdout, stderr, cin, cout, or cerr.