fegetexceptflag()

Stores a representation of the states of the floating-point exception flags.

  #include <fenv.h>
  
  void fegetexceptflag(fexcept_t *f, int excepts);

Parameter

f

A pointer to an exception flag variable.

excepts

Zero or more exceptions to reset.

Remarks

This function saves the states of floating-point exception flags to memory.

This facility may not be available on configurations of the EWL that run on platforms that do not have floating-point math capabilities.

Listing: Example of fegetexceptflag()


#include <fenv.h>

#include <stdio.h>

#pragma STDC FENV_ACCESS on

int main(void)

{

double x = 123.0;

double y = 0.0;

double result;

fexcept_t flags;

/* Reset flags before starting the calculation. */

feclearexcept(FE_ALL_EXCEPT);

result = x / y; /* Should set the FE_DIVBYZERO flag. */

fegetexceptflag(&flags, FE_ALL_EXCEPT);

if (flags & FE_DIVBYZERO)

printf("Division by zero.\n");

if (flags & FE_INEXACT)

printf("Inexact value.\n");

return 0;

}

Output:

Division by zero.