Debugging with print is like washing dishes with your fingers: unacknowledged, ubiquitous, very effective.
Way (way) back I had to use a Pascal implementation that buffered output. It was impossible to write nontrivial programs in.
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Squeak buffers output. I wrote an unbuffered Transcript for Cuis Smalltalk because of what you say. It was mostly ignored.
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used to write Symbian C++ apps. Had to printf to a file and Bluetooth back to PC. Impossible to do anything complex.
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C printf is still buffered. Main cause of grief among beginners debugging a segfault.
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that's why you fprintf to stderr.
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no flush() function? I remember turbo pascal having quite a good debugger, you were doing pascal even before turbo pascal?
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Dumping printf over a UDP socket also works well, in case you are debugging fullscreen programs (like video players).
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Don't forget to say $|++ in Perl.
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when in doubt, cout<<
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