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Message: [QUOTE="those who know me have no need of my name, post: 1689717"] in comp.lang.c i read: there are sufficiently perverse uses of programs such that it can help, yes. e.g., where stdout is connected to a non-interactive thing which never the less copies the output to an/the interactive device -- i.e., chris torek's recent response re use of a program with a pipe. the only real reason not to call fflush(stdout) is performance, and you aren't likely to be shooting for lots of performance with most sorts of stuff sent to stdout which is intended to provoke data to arrive via stdin. (as with most things -- this has any number of fairly obvious exceptions.) [/QUOTE]