User  |  Syst  |  Libr  |  Device  |  Files  |  Other  |  Admin  |  Head  |

---

   math.h.0p    ( 10 )

---

---

Использование в приложениях (Application usage)

The FP_CONTRACT pragma can be used to allow (if the state is on)
       or disallow (if the state is off) the implementation to contract
       expressions. Each pragma can occur either outside external
       declarations or preceding all explicit declarations and
       statements inside a compound statement. When outside external
       declarations, the pragma takes effect from its occurrence until
       another FP_CONTRACT pragma is encountered, or until the end of
       the translation unit. When inside a compound statement, the
       pragma takes effect from its occurrence until another FP_CONTRACT
       pragma is encountered (including within a nested compound
       statement), or until the end of the compound statement; at the
       end of a compound statement the state for the pragma is restored
       to its condition just before the compound statement. If this
       pragma is used in any other context, the behavior is undefined.
       The default state (on or off) for the pragma is implementation-
       defined.

       Applications should use FLT_MAX as described in the <float.h>
       header instead of the obsolescent MAXFLOAT.

       Note that if FLT_EVAL_METHOD is neither 0 nor 1, then some
       constants might not compare equal as expected; for example,
       (double)M_PI == M_PI can fail.

---