4.3BSD-UWisc/man/cat3/getc.3s

GETC(3S)            UNIX Programmer's Manual             GETC(3S)



NAME
     getc, getchar, fgetc, getw - get character or word from
     stream

SYNOPSIS
     #include <stdio.h>

     int getc(stream)
     FILE *stream;

     int getchar()

     int fgetc(stream)
     FILE *stream;

     int getw(stream)
     FILE *stream;

DESCRIPTION
     _G_e_t_c returns the next character from the named input _s_t_r_e_a_m.

     _G_e_t_c_h_a_r() is identical to _g_e_t_c(_s_t_d_i_n).

     _F_g_e_t_c behaves like _g_e_t_c, but is a genuine function, not a
     macro; it may be used to save object text.

     _G_e_t_w returns the next int (a 32-bit integer on a VAX-11)
     from the named input _s_t_r_e_a_m.  It returns the constant EOF
     upon end of file or error, but since that is a good integer
     value, _f_e_o_f and _f_e_r_r_o_r(3S) should be used to check the suc-
     cess of _g_e_t_w.  _G_e_t_w assumes no special alignment in the
     file.

SEE ALSO
     clearerr(3S), fopen(3S), putc(3S), gets(3S), scanf(3S),
     fread(3S), ungetc(3S)

DIAGNOSTICS
     These functions return the integer constant EOF at end of
     file, upon read error, or if an attempt is made to read a
     file not opened by _f_o_p_e_n.  The end-of-file condition is
     remembered, even on a terminal, and all subsequent attempts
     to read will return EOF until the condition is cleared with
     _c_l_e_a_r_e_r_r(3S).

BUGS
     Because it is implemented as a macro, _g_e_t_c treats a _s_t_r_e_a_m
     argument with side effects incorrectly.  In particular,
     `getc(*f++);' doesn't work sensibly.






Printed 12/27/86          May 14, 1986                          1