Rounding Modes for the Floating-Point Environment

Facilities for retrieving and setting the floating-point environment's modes for rounding off numbers.

The floating point environment has a control mode to specify how to perform rounding operations. The table below lists the macros that define the modes that specify how to round off numbers.

Table 1. Rounding Modes
Macro	Rounding Mode
`FE_DOWNWARD`	To the smallest integer
`FE_TONEAREST`	To the nearest integer
`FE_TOWARDZERO`	To the largest integer when negative, to the smallest integer when positive
`FE_UPWARD`	To the largest integer