Hugh wrote: > I would like to perform an addition without carrying of two integers... > I've got no idea how to do this in python, although I've been using it > for web/cgi/db work for a few years now. >
In multiword addition in assembly language, one uses a normal ADD instruction on the lowest-order pair of words, and an ADC (or ADDC or whatever) i.e add *with* carry which adds in the carry bit from the previous operation for each subsequent pair of words. IOW, addition *without* carrying is normal, and I don't recall hearing the expression before ...... Do you possibly mean: add two 32-bit integers such the result fits in 32 bits i.e. discard the generated carry bit, keep the low-order 32-bits? If so, that's simply (a + b) & 0xFFFFFFFF (in Python as well as a few other languages). If you meant a different number of bits, well the answer for 8 bits would be (a + b) & 0xFF. Otherwise, you need to provide some examples of two integers and what "addition without carrying" produces. HTH, John -- http://mail.python.org/mailman/listinfo/python-list
