C++ In a Nutshell

Name

FLT_ROUNDS macro — Rounding mode

Synopsis

int FLT_ROUNDS
               

The FLT_ROUNDS macro specifies how the implementation rounds floating-point numbers. Table 13-2 lists the possible values as defined in the C++ standard. An implementation can define additional values with other meanings.

Table 13-2. Floating-point rounding mode

Value	Description
-1	Indeterminable
0	Rounds toward 0
1	Rounds to nearest
2	Rounds up (toward positive infinity)
3	Rounds down (toward negative infinity)