How to multiply long numbers

Assuming we have a multiplication of n-bit-numbers already available. Other than typical compiled languages, which assume that the multiplication result fits into the same size as the two factors, we should take a closer look. Unsigned n-bit-numbers as factors and fullfill         So we have for the product     So we […]

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Testing Java- and C-programs with Ruby and Perl

It is very important to write good unit tests for software that is non-trivial and that is relied on by other pieces of software. Often the logic of the software can easily be covered by the native testing facilities of the programming language, like JUnit for Java or, much less well known but available, CUnit […]

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How to recover the Carry Bit

As frequent readers might have observed, I like the concept of the Carry Bit as it allows for efficient implementations of long integer arithmetic, which I would like to use as default integer type for most application development. And unfortunately such facilities are not available in high level languages like C and Java. But it […]

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Microsoft dropping Windows-Support

Microsoft’s CEO Satya Nadella announced that Microsoft is withdrawing its support for the MS-Windows platform and concentrating on its core business, which is „services – services – services“. For a transition period of a few months, support for MS-Windows can still be obtained at an increased rate from Microsoft, but development and support have become […]

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