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Library Functions - Programming

Q1:

What is the purpose of fflush() function.

A flushes all streams and specified streams.

B flushes only specified stream.

C flushes input/output buffer.

D flushes file buffer.

ANS:A - flushes all streams and specified streams.

"fflush()" flush any buffered output associated with filename, which is either a file opened for writing or a shell command for redirecting output to a pipe or coprocess. Example:
fflush(FilePointer);
fflush(NULL); flushes all streams.