fenv_t, fexcept_t − floating-point environment
Standard C library (libc)
#include <fenv.h>
typedef
/* ... */ fenv_t;
typedef /* ... */ fexcept_t;
fenv_t represents the entire floating-point environment, including control modes and status flags.
fexcept_t represents the floating-point status flags collectively.
For further details see fenv(3).
C11, POSIX.1-2008.
C99, POSIX.1-2001.
fenv(3)