fmax, fmaxf, fmaxl
Header: <math.h>
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).
# Declarations
float fmaxf( float x, float y );
(since C99)
double fmax( double x, double y );
(since C99)
long double fmaxl( long double x, long double y );
(since C99)
#define fmax( x, y )
(since C99)
# 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.
# 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 <math.h>
#include <stdio.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));
}