From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/c/numeric%2Ffenv%2Ffetestexcept.html | 60 ---------------------------- 1 file changed, 60 deletions(-) delete mode 100644 devdocs/c/numeric%2Ffenv%2Ffetestexcept.html (limited to 'devdocs/c/numeric%2Ffenv%2Ffetestexcept.html') diff --git a/devdocs/c/numeric%2Ffenv%2Ffetestexcept.html b/devdocs/c/numeric%2Ffenv%2Ffetestexcept.html deleted file mode 100644 index 6e100461..00000000 --- a/devdocs/c/numeric%2Ffenv%2Ffetestexcept.html +++ /dev/null @@ -1,60 +0,0 @@ -

fetestexcept

Defined in header <fenv.h> 
int fetestexcept( int excepts );
-		 (since C99)

Determines which of the specified subset of the floating-point exceptions are currently set. The argument excepts is a bitwise OR of the floating-point exception macros.

-

Parameters

- -
excepts - bitmask listing the exception flags to test

Return value

Bitwise OR of the floating-point exception macros that are both included in excepts and correspond to floating-point exceptions currently set.

-

Example

#include <stdio.h>
-#include <math.h>
-#include <fenv.h>
-#include <float.h>
- 
-#pragma STDC FENV_ACCESS ON
- 
-void show_fe_exceptions(void)
-{
-    printf("current exceptions raised: ");
-    if(fetestexcept(FE_DIVBYZERO))     printf(" FE_DIVBYZERO");
-    if(fetestexcept(FE_INEXACT))       printf(" FE_INEXACT");
-    if(fetestexcept(FE_INVALID))       printf(" FE_INVALID");
-    if(fetestexcept(FE_OVERFLOW))      printf(" FE_OVERFLOW");
-    if(fetestexcept(FE_UNDERFLOW))     printf(" FE_UNDERFLOW");
-    if(fetestexcept(FE_ALL_EXCEPT)==0) printf(" none");
-    printf("\n");
-}
- 
-int main(void)
-{
-    /* Show default set of exception flags. */
-    show_fe_exceptions();
- 
-    /* Perform some computations which raise exceptions. */
-    printf("1.0/0.0     = %f\n", 1.0/0.0);        /* FE_DIVBYZERO            */
-    printf("1.0/10.0    = %f\n", 1.0/10.0);       /* FE_INEXACT              */
-    printf("sqrt(-1)    = %f\n", sqrt(-1));       /* FE_INVALID              */
-    printf("DBL_MAX*2.0 = %f\n", DBL_MAX*2.0);    /* FE_INEXACT FE_OVERFLOW  */
-    printf("nextafter(DBL_MIN/pow(2.0,52),0.0) = %.1f\n",
-           nextafter(DBL_MIN/pow(2.0,52),0.0));   /* FE_INEXACT FE_UNDERFLOW */
-    show_fe_exceptions();
- 
-    return 0;
-}

Output:

-
current exceptions raised:  none
-1.0/0.0     = inf
-1.0/10.0    = 0.100000
-sqrt(-1)    = -nan
-DBL_MAX*2.0 = inf
-nextafter(DBL_MIN/pow(2.0,52),0.0) = 0.0
-current exceptions raised:  FE_DIVBYZERO FE_INEXACT FE_INVALID FE_OVERFLOW FE_UNDERFLOW

References

See also

- -
-
(C99)
 clears the specified floating-point status flags
(function)
C++ documentation for fetestexcept
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/numeric/fenv/fetestexcept -

-
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