Why doesn't C++ have <cstdfloat> header for floats like it has <cstdint> for integers?
EDIT :
By <cstdfloat> I mean header that provides typedefs for float and double. Much like qreal typedef in Qt. Hope my question is clear now.
+3
A:
Are you perhaps looking for <float.h> and its C++ brother <cfloat> instead?
Adam Rosenfield
2009-12-31 20:07:56
<float.h> is a different thing. I am talking about header that provides typedefs for float and double. Much like qreal typedef in Qt. Hope you understand my question now.
missingfaktor
2009-12-31 20:10:25
Then you should specify that in your question. Your question is incredibly vague.
Adam Rosenfield
2009-12-31 20:11:42
@Rosenfield : Sorry. Edited my question now.
missingfaktor
2009-12-31 20:12:30
+3
A:
Often an application needs exactly 16 bits for an integer for, say, a bitfield, but having exactly 16 bits for a float is kind of useless. Manipulating bits in an integer is easy, so having exactly 16 is nice. Manipulating bits in a float requires casting it to an integer, making a float16 type rather extraneous.
By the same token, having an integral type capable of storing (and also performing math on) pointers is useful, but who ever needs to convert a pointer value to a floating point value, then perform floating point math on it, then convert it back to a pointer?
The point is that most of the functionality in stdint.h (or cstdint for C++, except that stdint.h is a C99 header and isn't technically part of C++) doesn't apply to floating point values.
Chris Lutz
2009-12-31 20:20:46