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    isgreater

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    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 <math.h>
#include <stdio.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

    • C23 standard (ISO/IEC 9899:2024):
    • 7.12.14.1 The isgreater macro (p: TBD)
    • F.10.11 Comparison macros (p: TBD)
    • C17 standard (ISO/IEC 9899:2018):
    • 7.12.14.1 The isgreater macro (p: 189)
    • F.10.11 Comparison macros (p: 386-387)
    • 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

    (C99)
    		 checks if the first floating-point argument is less than the second
    (function macro) [edit]
    C++ documentation for isgreater