Understanding the Functionality of std::flush
Q: What does std::flush do in C ?
A: std::flush is a manipulator that invokes the flush() member function on an output stream object (e.g., std::cout). Its primary purpose is to force the buffer associated with the stream to flush its contents to the underlying destination (e.g., console, file).
Q: When should you flush a stream?
A: Flushing a stream is recommended in certain scenarios:
However, in most cases, flushing is handled automatically (e.g., when using std::cin to read user input, std::cout is automatically flushed before waiting for input).
Q: Why is flushing important?
A: Buffering characters before sending them to the destination can significantly improve performance. Flushing a stream:
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