enum float_round_style {
round_indeterminate = -1,
round_toward_zero = 0,
round_to_nearest = 1,
round_toward_infinity = 2,
round_toward_neg_infinity = 3
};The enumeration describes the various methods that an implementation can choose for rounding a floating-point value to an integer value:
round_indeterminate -- rounding method cannot be determined round_toward_zero -- round toward zero round_to_nearest -- round to nearest integer round_toward_infinity -- round away from zero round_toward_neg_infinity -- round to more negative integer