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─────Run-Time Library───────────────────────────────────────────────────────
 
     The _fpreset function reinitializes the floating-point-math
     package. This function is usually used in conjunction with signal,
     system, or the _exec or _spawn functions.
 
     If a program traps floating-point error signals (SIGFPE) with the
     signal function, it can safely recover from floating-point errors
     by invoking _fpreset and using longjmp.
 
     In MS-DOS versions prior to 3.0, a child process executed by
     _exec, _spawn, or system may affect the floating-point state of
     the parent process if an 8087, 80287, or 80387 coprocessor is
     used. Therefore, if you are using one of these coprocessors, the
     following precautions are recommended:
 
        ■ The _exec, _spawn, and system functions should not be called
          during the evaluation of a floating-point expression.
 
        ■ The _fpreset function should be called after these routines
          if there is a possibility of the child process performing any
          floating-point operations.
 
     Return Value
 
     None.
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