islessequal
From cppreference.com
| Defined in header
<math.h>
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| #define islessequal(x, y) /* implementation defined */
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(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.
Contents |
[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
Run this code
#include <stdio.h> #include <math.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
- C11 standard (ISO/IEC 9899:2011):
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- 7.12.14.4 The islessequal macro (p: 260)
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- F.10.11 Comparison macros (p: 531)
- C99 standard (ISO/IEC 9899:1999):
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- 7.12.14.4 The islessequal macro (p: 241)
[edit] See also
| (C99)
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checks if the first floating-point argument is greater or equal than the second (function) |
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C++ documentation for islessequal
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