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%2Fferound.html | 88 --------------------------------- 1 file changed, 88 deletions(-) delete mode 100644 devdocs/c/numeric%2Ffenv%2Fferound.html (limited to 'devdocs/c/numeric%2Ffenv%2Fferound.html') diff --git a/devdocs/c/numeric%2Ffenv%2Fferound.html b/devdocs/c/numeric%2Ffenv%2Fferound.html deleted file mode 100644 index 7bbe06b4..00000000 --- a/devdocs/c/numeric%2Ffenv%2Fferound.html +++ /dev/null @@ -1,88 +0,0 @@ -

fegetround, fesetround

Defined in header <fenv.h> 
int fesetround( int round );
-		 (1) (since C99) 
int fegetround();
-		 (2) (since C99)

1) Attempts to establish the floating-point rounding direction equal to the argument round, which is expected to be one of the floating-point rounding macros.

-

2) Returns the value of the floating-point rounding macro that corresponds to the current rounding direction.

-

Parameters

- -
round - rounding direction, one of floating-point rounding macros

Return value

1) ​0​ on success, non-zero otherwise.

-

2) the floating-point rounding macro describing the current rounding direction or a negative value if the direction cannot be determined.

-

Notes

The current rounding mode, reflecting the effects of the most recent fesetround, can also be queried with FLT_ROUNDS.

-

Example

#include <fenv.h>
-#include <math.h>
-#include <stdio.h>
- 
-// #pragma STDC FENV_ACCESS ON
- 
-void show_fe_current_rounding_direction(void)
-{
-    printf("current rounding direction:  ");
-    switch (fegetround()) {
-           case FE_TONEAREST:  printf ("FE_TONEAREST");  break;
-           case FE_DOWNWARD:   printf ("FE_DOWNWARD");   break;
-           case FE_UPWARD:     printf ("FE_UPWARD");     break;
-           case FE_TOWARDZERO: printf ("FE_TOWARDZERO"); break;
-           default:            printf ("unknown");
-    };
-    printf("\n");
-}
- 
-int main(void)
-{
-    /* Default rounding direction */
-    show_fe_current_rounding_direction();
-    printf("+11.5 -> %+4.1f\n", rint(+11.5)); /* midway between two integers */
-    printf("+12.5 -> %+4.1f\n", rint(+12.5)); /* midway between two integers */
- 
-    /* Save current rounding direction. */
-    int curr_direction = fegetround();
- 
-    /* Temporarily change current rounding direction. */
-    fesetround(FE_DOWNWARD);
-    show_fe_current_rounding_direction();
-    printf("+11.5 -> %+4.1f\n", rint(+11.5));
-    printf("+12.5 -> %+4.1f\n", rint(+12.5));
- 
-    /* Restore default rounding direction. */
-    fesetround(curr_direction);
-    show_fe_current_rounding_direction();
- 
-    return 0;
-}

Possible output:

-
current rounding direction:  FE_TONEAREST
-+11.5 -> +12.0
-+12.5 -> +12.0
-current rounding direction:  FE_DOWNWARD
-+11.5 -> +11.0
-+12.5 -> +12.0
-current rounding direction:  FE_TONEAREST

References

See also

- - -
-
(C99)(C99)(C99)
 rounds to an integer using current rounding mode
(function)
-
(C99)(C99)(C99)(C99)(C99)(C99)(C99)(C99)(C99)
 rounds to an integer using current rounding mode with
exception if the result differs
(function)
C++ documentation for fegetround, fesetround
-

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

-
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