Buffering of Cs stdout is implementation defined. For Linux it is only line buffered in an interactive terminal session and fully buffered otherwise. > Are you

Buffering of Cs stdout is implementation defined. For Linux it is only line buffered in an interactive terminal session and fully buffered otherwise. > Are you saying you never want to flush? 90% of the time not. The other ten percent include asking for user input, which causes an implicit flush since std::cin is linked to std::cout, and debugging an ugly heisenbug.