2. curses library I/O processing-Description of curses

2.1 description of curses

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2.1.1 constant definition in curses

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* OK

The Return Value of the curses library function, which is defined as 0.

* ERR

The returned value when the curses library function is run incorrectly. The system defines it as-1.

* TRUE

Boolean value, indicating true. The system is defined as 1.

* FALSE

Boolean value, indicating false, which is defined as 0.

2.1.2 curses function naming rules

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* By default, the function acts directly on stdscr.

* If a function is to operate on a specified WINDOW rather than stdscr, all these functions carry w as the front, and one of its functions is a WINDOW pointer of a WINDOW structure.

* If a function is a combination of a moving operation and an input/output operation, these functions are preceded by a music video and the moving coordinates (y, x) are used as the first two functions.

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