05 Jun, 2009, David Haley wrote in the 61st comment:
Votes: 0
Quote
Both may be rounding the results, although I'm somewhat less convinced of this, as how would the library know to what precision you want things rounded?
The same way the C++ output streams know to. It's (probably) not that the computation is rounded: just the display. It could be guessing based on the sig figs in the input. You could try something like 1.23 + 1.23 and see what you get, and then try 1.23 + 1.231, and see if it rounds the same way.
The same way the C++ output streams know to. It's (probably) not that the computation is rounded: just the display. It could be guessing based on the sig figs in the input. You could try something like 1.23 + 1.23 and see what you get, and then try 1.23 + 1.231, and see if it rounds the same way.