Hi Andries, Reading the POSIX.1 specs of various functions, I see that sometimes they talk of the return value of a function as being +0, sometimes +-0, and sometimes -0. Does one need to care about this? (e.g., in updating them man-pages, I'm inclined to group the 0 cases togetehr, where possible). If one does need to care, then could you explain to me why? Are there cases where one gets bitten by not caring? (I've had a browse through the C standard, but I'm not sure that I am yet any the wiser.) Hmmm -- just now, I find the Wikipedia article: http://en.wikipedia.org/wiki/%E2%88%920_(number). So, are these the only cases that matter (quoting test from wp): * using the copysign() function, which is defined by IEEE 754 to copy the sign of the zero, to some non-zero number * dividing the number into a positive number—the resulting Infinity will reflect the sign of the zero. ? It starts to sound like I should care about postive and negative zero when rewriting the man pages, or? Cheers, Michael -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
