isgreater

C

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Atomic operations (C11)

Thread support (C11)

Technical Specifications

Numerics

Common mathematical functions

Floating-point environment

Complex number arithmetics

Random number generation

Type-generic math

Common mathematical functions

Functions
Basic operations
abslabsllabsimaxabs (C99) fabs divldivlldivimaxdiv (C99) fmod	remainder (C99) remquo (C99) fma (C99) fmax (C99) fmin (C99) fdim (C99) nannanfnanl (C99)(C99)(C99)
Exponential functions
exp exp2 (C99) expm1 (C99)	log log10 log1p (C99) log2 (C99)
Power functions
sqrt cbrt (C99)	hypot (C99) pow
Trigonometric and hyperbolic functions
sin cos tan asin acos atan atan2	sinh cosh tanh asinh (C99) acosh (C99) atanh (C99)
Error and gamma functions
erf (C99) erfc (C99)	lgamma (C99) tgamma (C99)
Nearest integer floating point operations
ceil floor roundlroundllround (C99)(C99)(C99)	trunc (C99) nearbyint (C99) rintlrintllrint (C99)(C99)(C99)
Floating point manipulation functions
ldexp scalbnscalbln (C99)(C99) ilogb (C99) logb (C99)	frexp modf nextafternexttoward (C99)(C99) copysign (C99)
Classification
fpclassify (C99) isfinite (C99) isinf (C99) isnan (C99) isnormal (C99) signbit (C99)	isgreater (C99) isgreaterequal (C99) isless (C99) islessequal (C99) islessgreater (C99) isunordered (C99)
Types
div_tldiv_tlldiv_timaxdiv_t (C99)(C99)	float_tdouble_t (C99)(C99)
Macro constants
HUGE_VALFHUGE_VALHUGE_VALL (C99)(C99) FP_FAST_FMAFFP_FAST_FMAFP_FAST_FMAL (C99)(C99)(C99) math_errhandlingMATH_ERRNOMATH_ERRNOEXCEPT (C99)(C99)(C99)	INFINITY (C99) NAN (C99) FP_ILOGB0FP_ILOGBNAN (C99)(C99) FP_NORMALFP_SUBNORMALFP_ZEROFP_INFINITEFP_NAN (C99)(C99)(C99)(C99)(C99)

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

Determines if the floating point number x is 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, 0 otherwise.

Notes

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

Example

Run this code

#include <stdio.h>
#include <math.h>

int main(void)
{
    printf("isgreater(2.0,1.0)      =%d\n", isgreater(2.0,1.0));
    printf("isgreater(1.0,2.0)      =%d\n", isgreater(1.0,2.0));
    printf("isgreater(INFINITY,1.0) =%d\n", isgreater(INFINITY,1.0));
    printf("isgreater(1.0,NAN)      =%d\n", isgreater(1.0,NAN));

    return 0;
}

Possible output:

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

References

• C11 standard (ISO/IEC 9899:2011):

• 7.12.14.1 The isgreater macro (p: 259)

• F.10.11 Comparison macros (p: 531)

• C99 standard (ISO/IEC 9899:1999):

• 7.12.14.1 The isgreater macro (p: 240)

See also

isless (C99)

checks if the first floating-point argument is less than the second (function)