In the C++ standard it says of floating literals:
If the scaled value is not in the range of representable values for its type, the program is ill-formed.
The scaled value is the significant part multiplied by 10 ^ exponent part.
Under x86-64:
float is a single-precision IEEE-754double is a double-precision IEEE-754long double is an 80-bit extended precision IEEE-754In this context, what is the range of repsentable values for each of these three types? Where is this documented? or how is it calculated?
The answer (if you're on a machine with IEEE floating point) is
in float.h. FLT_MAX, DBL_MAX and LDBL_MAX. On a system
with full IEEE support, something around 3.4e+38, 1.8E+308 and
1.2E4932. (The exact values may vary, and may be expressed
differently, depending on how the compiler does its input and
rounding. g++, for example, defines them to be compiler
built-ins.)
EDIT:
WRT your question (since neither I nor the other responders
actually answered it): the range of representable values is
[-type_MAX...type], where
type is one of FLT, DBL, or LDBL.