getc, getchar, fgetc, getw - get character or word from stream
Getc returns the next character from the named input stream.
Getchar() is identical to getc(stdin).
Fgetc behaves like getc, but is a genuine function, not a macro; it may be used to save
Getw returns the next word from the named input stream. It returns the constant EOF upon
end of file or error, but since that is a good integer value, feof and ferror(3) should be
used to check the success of getw. Getw assumes no special alignment in the file.
fopen(3), putc(3), gets(3), scanf(3), fread(3), ungetc(3)
These functions return the integer constant EOF at end of file or upon read error.
A stop with message, `Reading bad file', means an attempt has been made to read from a
stream that has not been opened for reading by fopen.
The end-of-file return from getchar is incompatible with that in UNIX editions 1-6.
Because it is implemented as a macro, getc treats a stream argument with side effects
incorrectly. In particular, `getc(*f++);' doesn't work sensibly.