paul womack twisted the bytes to say:
paul> Bart.van.Andel wrote: >> Although I'm not really into this code, shouldn't a divide by zero >> result in NAN instead of INF? paul> According to this: paul> http://en.wikipedia.org/wiki/Division_by_zero paul> It's well defined, and works as you would hope: Yes, try this: ---------------------------------------------------------------------- #include <stdio.h> #include <math.h> #include <assert.h> int main(void) { double x = 0; double y; y = 1/x; printf("hello world [%f]\n", y); assert(isinf(y)); assert(isnan(y)); } ---------------------------------------------------------------------- paul> IEEE floating-point standard, supported by almost all modern paul> processors, specifies that every floating point arithmetic paul> operation, including division by zero, has a well-defined paul> result. In IEEE 754 arithmetic, a รท 0 is positive infinity when paul> a is positive, negative infinity when a is negative, and NaN paul> (not a number) when a = 0. The infinity signs change when paul> dividing by -0 instead. This is possible because in IEEE 754 paul> there are two zero values, plus zero and minus zero, and thus paul> no ambiguity. BugBear paul> -- -- Daniel M. German http://turingmachine.org/ http://silvernegative.com/ dmg (at) uvic (dot) ca replace (at) with @ and (dot) with . -- Daniel M. German "I'm crazy, but I'm not stupid" Jackie Chan http://turingmachine.org/ http://silvernegative.com/ dmg (at) uvic (dot) ca replace (at) with @ and (dot) with . --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ To post to this group, send email to hugin-ptx@googlegroups.com To unsubscribe from this group, send email to hugin-ptx-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/hugin-ptx -~----------~----~----~----~------~----~------~--~---
