为什么float.NaN != double.NaN
?
whilefloat.PositiveInfinity == double.PositiveInfinity
和float.NegativeInfinity == double.NegativeInfinity
相等。_
例子:
bool PosInfinity = (float.PositiveInfinity == double.PositiveInfinity); //true
bool NegInfinity = (float.NegativeInfinity == double.NegativeInfinity); //true
bool isNanEqual = (float.NaN == double.NaN); //false, WHY?