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fmax, fmaxf, fmaxl

Defined in header <math.h> 
float       fmaxf( float x, float y );
-		 (1) (since C99) 
double      fmax( double x, double y );
-		 (2) (since C99) 
long double fmaxl( long double x, long double y );
-		 (3) (since C99)
Defined in header <tgmath.h> 
#define fmax( x, y )
-		 (4) (since C99)
-1-3) Returns the larger of two floating point arguments, treating NaNs as missing data (between a NaN and a numeric value, the numeric value is chosen).
-4) Type-generic macro: If any argument has type long double, fmaxl is called. Otherwise, if any argument has integer type or has type double, fmax is called. Otherwise, fmaxf is called.

Parameters

- -
x, y - floating point values

Return value

If successful, returns the larger of two floating point values. The value returned is exact and does not depend on any rounding modes.

-

Error handling

This function is not subject to any of the error conditions specified in math_errhandling.

-

If the implementation supports IEEE floating-point arithmetic (IEC 60559),

-

Notes

This function is not required to be sensitive to the sign of zero, although some implementations additionally enforce that if one argument is +0 and the other is -0, then +0 is returned.

-

Example

#include <stdio.h>
-#include <math.h>
- 
-int main(void)
-{
-    printf("fmax(2,1)    = %f\n", fmax(2,1));
-    printf("fmax(-Inf,0) = %f\n", fmax(-INFINITY,0));
-    printf("fmax(NaN,-1) = %f\n", fmax(NAN,-1));
-}

Output:

-
fmax(2,1)    = 2.000000
-fmax(-Inf,0) = 0.000000
-fmax(NaN,-1) = -1.000000

References

See also

- - -
-
(C99)
 checks if the first floating-point argument is greater than the second
(function macro)
-
(C99)(C99)(C99)
 determines smaller of two floating-point values
(function)
C++ documentation for fmax
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/numeric/math/fmax -

-
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