Flushing input stream

[Git]

There is an ANSI C _flushall() command that causes all open buffers to be flushed to file. There is also a stream.flush() function if you are using C++ stream i/o. They may help, but I am not quite sure what you mean by flushing an input buffer, but if you don't have the source code to prog1 I don't see how you can affect it's behaviour. Unless.. if you can redirect stdout to a pipe then i/o can be made non-buffered, but I am still unsure if it can work.

Git