Is that 19! ? Probably doesn't fit precisely into a double. Does strtold behave better?
Some implementations throw on unrepresentable numbers, e.g. https://docs.oracle.com/cd/E19253-01/816-5168/6mbb3hrte/index.html Ken Brown <kbr...@cornell.edu> schrieb am Sa., 7. Apr. 2018, 10:40: > $ cat strtod_test.c > #include <stdio.h> > #include <stdlib.h> > #include <fenv.h> > > int > main () > { > /* The following number comes from /usr/share/asymptote/ode.asy. */ > const char *str = "121645100408832000.0"; > char *ptr; > > feenableexcept (FE_INVALID); > strtod (str, &ptr); > > /* If there was an exception, the following will not get executed. */ > printf ("No exception.\n"); > } > > $ gcc strtod_test.c > > $ ./a > Floating point exception (core dumped) > > [The above was on x86. On x86_64 there's simply no output.] > > I have no idea what's special about the number 121645100408832000.0, but > the problem goes away if, for example, I replace the leading 1 by 2. > > Ken > > -- > Problem reports: http://cygwin.com/problems.html > FAQ: http://cygwin.com/faq/ > Documentation: http://cygwin.com/docs.html > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple > > > -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
