From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Sun, 7 Apr 2024 13:41:34 -0500 Subject: new repository --- devdocs/c/numeric%2Fmath%2Fisunordered.html | 40 +++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 devdocs/c/numeric%2Fmath%2Fisunordered.html (limited to 'devdocs/c/numeric%2Fmath%2Fisunordered.html') diff --git a/devdocs/c/numeric%2Fmath%2Fisunordered.html b/devdocs/c/numeric%2Fmath%2Fisunordered.html new file mode 100644 index 00000000..5341387f --- /dev/null +++ b/devdocs/c/numeric%2Fmath%2Fisunordered.html @@ -0,0 +1,40 @@ +

isunordered

Defined in header <math.h> 
#define isunordered(x, y) /* implementation defined */
+		 (since C99)

Determines if the floating point numbers x and y are unordered, that is, one or both are NaN and thus cannot be meaningfully compared with each other.

+

Parameters

+ + +
x - floating point value
y - floating point value

Return value

Nonzero integral value if either x or y is NaN, ​0​ otherwise.

+

Example

#include <stdio.h>
+#include <math.h>
+ 
+int main(void)
+{
+    printf("isunordered(NAN,1.0) = %d\n", isunordered(NAN,1.0));
+    printf("isunordered(1.0,NAN) = %d\n", isunordered(1.0,NAN));
+    printf("isunordered(NAN,NAN) = %d\n", isunordered(NAN,NAN));
+    printf("isunordered(1.0,0.0) = %d\n", isunordered(1.0,0.0));
+ 
+    return 0;
+}

Possible output:

+
isunordered(NAN,1.0) = 1
+isunordered(1.0,NAN) = 1
+isunordered(NAN,NAN) = 1
+isunordered(1.0,0.0) = 0

References

See also

+ + +
+
(C99)
 classifies the given floating-point value
(function macro)
+
(C99)
 checks if the given number is NaN
(function macro)
C++ documentation for isunordered
+

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

+
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