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Console and Port I/O

These routines read and write on your console or on the specified port. The console I/O routines are not compatible with stream I/O or low-level I/O library routines. The console or port does not have to be opened or closed before I/O is performed, so there are no open or close routines in this category. In the Windows operating systems, the output from these functions is always directed to the console and cannot be redirected.

Console and Port I/O Routines

Routine

Use

_cgets, _cgetws, _cgets_s, _cgetws_s

Read string from console

_cprintf, _cwprintf, _cprintf_s, _cprintf_s_l, _cwprintf_s, _cwprintf_s_l

Write formatted data to console

_cputs

Write string to console

_cscanf, _cwscanf, _cscanf_s, _cscanf_s_l, _cwscanf_s, _cwscanf_s_l

Read formatted data from console

_getch, _getwch

Read character from console

_getche, _getwche

Read character from console and echo it

_inp

Read one byte from specified I/O port

_inpd

Read double word from specified I/O port

_inpw

Read 2-byte word from specified I/O port

_kbhit

Check for keystroke at console; use before attempting to read from console

_outp

Write one byte to specified I/O port

_outpd

Write double word to specified I/O port

_outpw

Write word to specified I/O port

_putch, _putwch

Write character to console

_ungetch, _ungetwch

"Unget" last character read from console so it becomes next character read

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