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Talk:Four bit adder: Difference between revisions
→C++ code size
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: Meh. The C++ code appears to be quite thorough and models the concept of physical devices pretty well. It's wordy, but that's C++. It actually can notice connection errors because everything exists as a device down to the input voltage sources. Compared to it, the C example is completely worthless as a "simulation", where you might have forgotten to put a voltage on one of the input pins and the program will merrily give you garbage output without noticing a thing. I suspect a lot of other languages also have this problem, which makes the task sort of much ado about nothing. It's very possible the C++ code can be shortened, but if it ends up like the C code, I'd prefer the way it is now, however much I hate long winded code. --[[User:Ledrug|Ledrug]] 21:42, 30 September 2011 (UTC)
:: But the task description does not even mention voltages, nor does it ask us to build up the gates on simulated silicon (or any other such model). Meanwhile, you can build four bit adders using optical or mechanical gates, where voltages are not a meaningful concept. So it's not far to describe this issue as a problem with the implementations in other languages. --[[User:Rdm|Rdm]] 22:27, 30 September 2011 (UTC)
::: Look, it's not my word: the C example called the inputs "pins" and the assignment statement "V", what was I supposed to infer? The desc does use the word "simulate", btw. I don't really care if you simulate a voltage or water pressure, the matter is task description does seem to want some reasonable simulation despite wasting a lot of effort talking about how one should use bit mask as input/output values. The C code along with some translated code did the task without a remotely systematic way of simulating a circuit (can you verify input pins are all with valid values? how much work is it change the code to do a 128 bit adder instead of 4?), it's ironic to call this a simulation. --[[User:Ledrug|Ledrug]] 23:23, 30 September 2011 (UTC)
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