How do I initialize number with NaN in Borland C++?
duplicate: Using NaN in C++?
+4
A:
You can look at std::numeric_limits<double>::quiet_NaN(). Include <limits>.
Carl Seleborg
2009-10-05 13:13:43
In the documentation they say "The quiet NaN for type int is: 0"... how can I discriminate between NaN and real 0?
luvieere
2009-10-05 13:45:38
NaN is only applicable for floating point types.
Bill
2009-10-05 13:50:53
@luvieere. Check std::numeric_limits<int>::has_quiet_NaN; You will find it is false. while std::numeric_limits<double>::has_quiet_NaN is true
Martin York
2009-10-05 16:09:57