Bryan Olson wrote: > Scott David Daniels wrote: > >> C, which was designed as a "high level assembly language," does not >> tightly define the results of / and % for negative numbers. Instead >> it defines the result for positive over positive, and constrains the >> result for the others. >> > > Not true. Here it is again: > > When integers are divided, the result of the / operator is > the algebraic quotient with any fractional part discarded.(87) > If the quotient a/b is representable, the expression > (a/b)*b + a%b shall equal a. > [...] > 87) This is often called ‘‘truncation toward zero’’. > > [International Standard ISO/IEC 9899:1999, Section 6.5.5 > Multiplicative operators, Paragraph 6 and footnote 87] > > > But C was around for a long time before the 1999 standard. C89, commonly called ANSI C, is still very commonly used in compilers, and K&R C goes back to 1972. Is truncation toward 0 the standard for K&R C as well?
Cheers, Cliff -- http://mail.python.org/mailman/listinfo/python-list
