fmax, fmaxf, fmaxl

[アーティクル]
06/05/2017

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Determine the larger of two specified numeric values.

Syntax

double fmax(  
   double x,   
   double y  
);  
  
float fmax(  
   float x,   
   float y  
); //C++ only  
  
long double fmax(  
   long double x,   
   long double y  
); //C++ only  
  
float fmaxf(  
   float x,   
   float y  
);  
  
long double fmaxl(  
   long double x,   
   long double y  
);

Parameters

[in] x
The first value to compare.

[in] y
The second value to compare.

Return Value

If successful, returns the larger of x or y. The value returned is exact, and does not depend on any form of rounding.

Otherwise, may return one of the following values:

Issue	Return
`x` = NaN	`y`
`y` = NaN	`x`
`x` and `y` = NaN	NaN

This function does not use the errors specified in _matherr.

Remarks

Because C++ allows overloading, you can call overloads of fmax that take and return float and long double types. In a C program, fmax always takes and returns a double.

Requirements

Function	C header	C++ header
`fmax`, `fmaxf`, `fmaxl`	<math.h>	<cmath>

For additional compatibility information, see Compatibility.

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