islessgreater
From cppreference.com
| Defined in header <math.h>
|
||
| #define islessgreater(x, y) /* implementation defined */ |
(since C99) | |
Determines if the floating-point number x is less than or greater than the floating-point number y, without setting floating-point exceptions.
Parameters
| x | - | floating-point value |
| y | - | floating-point value |
Return value
Nonzero integral value if x < y || x > y, 0 otherwise.
Notes
The built-in operator< and 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 the expression x < y || x > y. The macro does not evaluate x and y twice.
Example
Run this code
#include <math.h> #include <stdio.h> int main(void) { printf("islessgreater(2.0,1.0) = %d\n", islessgreater(2.0, 1.0)); printf("islessgreater(1.0,2.0) = %d\n", islessgreater(1.0, 2.0)); printf("islessgreater(1.0,1.0) = %d\n", islessgreater(1.0, 1.0)); printf("islessgreater(INFINITY,1.0) = %d\n", islessgreater(INFINITY, 1.0)); printf("islessgreater(1.0,NAN) = %d\n", islessgreater(1.0, NAN)); return 0; }
Possible output:
islessgreater(2.0,1.0) = 1 islessgreater(1.0,2.0) = 1 islessgreater(1.0,1.0) = 0 islessgreater(INFINITY,1.0) = 1 islessgreater(1.0,NAN) = 0
References
- C23 standard (ISO/IEC 9899:2024):
- 7.12.14.5 The islessgreater macro (p: TBD)
- F.10.11 Comparison macros (p: TBD)
- C17 standard (ISO/IEC 9899:2018):
- 7.12.14.5 The islessgreater macro (p: TBD)
- F.10.11 Comparison macros (p: TBD)
- C11 standard (ISO/IEC 9899:2011):
- 7.12.14.5 The islessgreater macro (p: 261)
- F.10.11 Comparison macros (p: 531)
- C99 standard (ISO/IEC 9899:1999):
- 7.12.14.5 The islessgreater macro (p: 241-242)
See also
| (C99) |
checks if the first floating-point argument is less than the second (function macro) |
| (C99) |
checks if the first floating-point argument is greater than the second (function macro) |
| C++ documentation for islessgreater
| |