cplusplus
.com
TUTORIALS
REFERENCE
ARTICLES
FORUM
C++
Tutorials
Reference
Articles
Forum
Reference
C library:
<cassert> (assert.h)
<cctype> (ctype.h)
<cerrno> (errno.h)
C++11
<cfenv> (fenv.h)
<cfloat> (float.h)
C++11
<cinttypes> (inttypes.h)
<ciso646> (iso646.h)
<climits> (limits.h)
<clocale> (locale.h)
<cmath> (math.h)
<csetjmp> (setjmp.h)
<csignal> (signal.h)
<cstdarg> (stdarg.h)
C++11
<cstdbool> (stdbool.h)
<cstddef> (stddef.h)
C++11
<cstdint> (stdint.h)
<cstdio> (stdio.h)
<cstdlib> (stdlib.h)
<cstring> (string.h)
C++11
<ctgmath> (tgmath.h)
<ctime> (time.h)
C++11
<cuchar> (uchar.h)
<cwchar> (wchar.h)
<cwctype> (wctype.h)
Containers:
C++11
<array>
<deque>
C++11
<forward_list>
<list>
<map>
<queue>
<set>
<stack>
C++11
<unordered_map>
C++11
<unordered_set>
<vector>
Input/Output:
<fstream>
<iomanip>
<ios>
<iosfwd>
<iostream>
<istream>
<ostream>
<sstream>
<streambuf>
Multi-threading:
C++11
<atomic>
C++11
<condition_variable>
C++11
<future>
C++11
<mutex>
C++11
<thread>
Other:
<algorithm>
<bitset>
C++11
<chrono>
C++11
<codecvt>
<complex>
<exception>
<functional>
C++11
<initializer_list>
<iterator>
<limits>
<locale>
<memory>
<new>
<numeric>
C++11
<random>
C++11
<ratio>
C++11
<regex>
<stdexcept>
<string>
C++11
<system_error>
C++11
<tuple>
C++11
<type_traits>
C++11
<typeindex>
<typeinfo>
<utility>
<valarray>
<cfenv> (fenv.h)
functions
C++11
feclearexcept
C++11
fegetenv
C++11
fegetexceptflag
C++11
fegetround
C++11
feholdexcept
C++11
feraiseexcept
C++11
fesetenv
C++11
fesetexceptflag
C++11
fesetround
C++11
fetestexcept
C++11
feupdateenv
types
C++11
fenv_t
C++11
fexcept_t
pragma
C++11
FENV_ACCESS
macro constants
C++11
FE_ALL_EXCEPT
C++11
FE_DFL_ENV
C++11
FE_DIVBYZERO
C++11
FE_DOWNWARD
C++11
FE_INEXACT
C++11
FE_INVALID
C++11
FE_OVERFLOW
C++11
FE_TONEAREST
C++11
FE_TOWARDZERO
C++11
FE_UNDERFLOW
C++11
FE_UPWARD
Reference
<cfenv>
FE_DOWNWARD
macro
<cfenv>
FE_DOWNWARD
int
Downward rounding direction mode
This macro expands to a value of type
int
that identifies the
downward
rounding direction mode for functions
fegetround
and
fesetround
.
Rounding
x
downward
selects the largest possible value that is not greater than
x
.
Possible
rounding direction modes
are:
macro value
description
FE_DOWNWARD
Round downward.
FE_TONEAREST
Round to nearest.
FE_TOWARDZERO
Round toward zero.
FE_UPWARD
Round upward.
See also
FE_TONEAREST
To-nearest rounding direction mode
(macro)
FE_TOWARDZERO
Toward-zero rounding direction mode
(macro)
FE_UPWARD
Upward rounding direction mode
(macro)
fegetround
Get rounding direction mode
(function)
fesetround
Set rounding direction mode
(function)