fmax(), fmaxf(), fmaxl()

Determine the maximum of two floating-point numbers

Synopsis:

#include <math.h>

double fmax( double x,
             double y );

float fmaxf( float x,
             float y );

long double fmaxl( long double x,
                   long double y );

Arguments:

x, y: The numbers that you want to compare.

Library:

libm

Use the -l m option to qcc to link against this library.

Description:

The fmax(), fmaxf(), and fmaxl() functions determine the maximum of two floating-point numbers.

To check for error situations, use feclearexcept() and fetestexcept(). For example:

Call feclearexcept(FE_ALL_EXCEPT) before calling fmax(), fmaxf(), or fmaxl().
On return, if fetestexcept(FE_ALL_EXCEPT) is nonzero, then an error has occurred.

Returns:

The maximum of the arguments.

If:	These functions return:	Errors:
`x` and `y` are both NaN	NaN	—
Just one of the arguments is NaN	The numeric value	—

These functions raise FE_INEXACT if the FPU reports that the result can't be exactly represented as a floating-point number.

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	No
Thread	Yes