BC number theory programs
BC (version 1.07.1) (see the manual) is a programming language that supports arbitrary precision integer arithmetic calculations with interactive execution of statements.
It is an idiosyncratic programming language which closely resembles parts
of the C language. While it is somewhat slow for some purposes (all code is
executed as it is read), the author has found bc very useful in
teaching and research. The code is very easy to read and students can see
directly how an algorithm has been implemented. It is also useful as a template
for harder-to-write, but faster C code.
Bugs and idiosyncrasies:
- When using the if-else construction, insert a "\", as follows:
Alternatively, as pointed out by Anton Stiglic, use the construction
- The continue statement only works for for loops.
- Alan Offer has pointed out that f(*b) changes the array values.
- January 27, 2020. I found that the BC 1.06.95 command
bc bigu stoltvialmm squareroot
produced an error message:
squareroot 667: Assignment of a void expression
However on changing the order of files to
bc squareroot bigu stoltvialmm
there was no problem! This phenomenon is not present in bc 1.07.1.
Pádraig Brady's example.
Last modified February 3, 2020