#define FE_DFL_ENV /*implementation defined*/
(since C++11)The macro constant FE_DFL_ENV expands to an expression of type const std::fenv_t*, which points to a full copy of the default floating-point environment, that is, the environment as loaded at program startup.
Additional macros that begin with FE_ followed by uppercase letters, and have the type const std::fenv_t*, may be supported by an implementation.
Output:
On startup: rounding to nearest Before restoration: underflow is raised overflow is raised rounding up After reset to default: rounding to nearest[edit] See also
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