C 的特殊字元

- '\n' closes a line
- '\f' closes a page
- '\t' prints a tab wide spaces (whereas the definition of the tab
depends on the driver attached to the stream.)
- '\b' lets the logical cursor go a char backwards
whereas this cursor may be a the cursor on screen, the printhead,
a pinter inside the print buffer on the device or the driver....
- '\a' may ring a bell, a siren, or another device that
does require the attention of the operator or even does nothing when
no device that can be activated on that signal gets activated.
On a PC it will give traditionally a signal to the speaker or
play a wave file through the soudcard - or even do nothing or
something else.