islessequal - cppreference.com (original) (raw)

| | | | | -------------------------------------------------------- | | ----------- | | #define islessequal(x, y) /* implementation defined */ | | (since C99) |

Determines if the floating-point number x is less than or equal to the floating-point number y, without setting floating-point exceptions.

[edit] Parameters

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

[edit] Return value

Nonzero integral value if x <= y, 0 otherwise.

[edit] Notes

The built-in operator<= for floating-point numbers may raise FE_INVALID if one or both of the arguments is NaN. This function is a "quiet" version of operator<=.

[edit] Example

#include <math.h> #include <stdio.h> int main(void) { printf("islessequal(2.0,1.0) = %d\n", islessequal(2.0, 1.0)); printf("islessequal(1.0,2.0) = %d\n", islessequal(1.0, 2.0)); printf("islessequal(1.0,1.0) = %d\n", islessequal(1.0, 1.0)); printf("islessequal(INFINITY,1.0) = %d\n", islessequal(INFINITY, 1.0)); printf("islessequal(1.0,NAN) = %d\n", islessequal(1.0, NAN)); return 0; }

Possible output:

islessequal(2.0,1.0) = 0 islessequal(1.0,2.0) = 1 islessequal(1.0,1.0) = 1 islessequal(INFINITY,1.0) = 0 islessequal(1.0,NAN) = 0

[edit] References