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FE_DFL_ENV

提供: cppreference.com
< c‎ | numeric‎ | fenv

Defined in header <<fenv.h>>
#define FE_DFL_ENV  /*implementation defined*/
マクロ定数FE_DFL_ENVは、プログラムの起動時にロードされるような環境であり、デフォルトの浮動小数点環境の完全なコピーを指し示しタイプconst fenv_t*、の式に展開されます.
Original:
The macro constant FE_DFL_ENV expands to an expression of type const fenv_t*, which points to a full copy of the default floating-point environment, that is, the environment as loaded at program startup.
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大文字が続くFE_で始まり、タイプconst fenv_t*を持つ追加のマクロは、実装によってサポートされるかもしれません.
Original:
Additional macros that begin with FE_ followed by uppercase letters, and have the type const fenv_t*, may be supported by an implementation.
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現在の浮動小数点環境を保存したり復元します
Original:
saves or restores the current floating point environment
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(関数) [edit]
浮動小数点環境を復元し、以前に例外を発生させることが発生します
Original:
restores the floating-point environment and raises the previously raise exceptions
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(関数) [edit]
C++ documentation for FE_DFL_ENV