putw(3) -- Linux man page
NAMEgetw, putw - input and output of words (ints)
#include <stdio.h> int getw(FILE *stream); int putw(int w, FILE *stream);
DESCRIPTIONgetw reads a word (that is, an int) from stream. It's provided for compatibility with SVID. We recommend you use fread(3) instead. putw writes the word w (that is, an int) to stream. It is provided for compatibility with SVID, but we recommend you use fwrite(3) instead.
RETURN VALUENormally, getw returns the word read, and putw returns 0. On error, they return EOF.
BUGSThe value returned on error is also a legitimate data value. ferror(3) can be used to distinguish between the two cases.
SEE ALSOfread(3), fwrite(3), ferror(3), getc(3), putc(3)