Q: How can I flush pending input so that a user's typeahead isn't read at the next prompt? Will fflush(stdin) work?
A: fflush is defined only for output streams. Since its definition of ``flush'' is to complete the writing of buffered characters (not to discard them), discarding unread input would not be an analogous meaning for fflush on input streams. See also question 12.26b.
References:
ISO Sec. 7.9.5.2
H&S Sec. 15.2
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