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Debugging (lemmy.ml)

submitted 6 days ago by [email protected] to c/[email protected]

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[–] [email protected] 1 points 6 days ago (1 children)

And who actually writes tests like that?

I mean, do you think tests do the calculations again? You simply have well defined input and known, static output. That's it.

[–] [email protected] 2 points 6 days ago* (last edited 6 days ago)

Yeah, you definitely run fixed tests on the whole thing. But when it returns indecipherable garbage, you've got to dive in in more detail, and at that point you're just doing breakpoints and watchpoints and looking at walls of floating point values.

I suppose Strassen's is recursive, so you could tackle it that way, but for other numerical-type things there is no such option.