FMAX(3) Library Functions Manual FMAX(3)

fmax fmaxf fmaxl — determine maximum numeric value of two floating-point numbers

#include <math.h>

double fmax(double x, double y);
float fmaxf(float x, float y);
long double fmaxl(long double x, long double y);

The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of POSIX.1-2017 defers to the ISO C standard.

These functions shall determine the maximum numeric value of their arguments. [MX] NaN arguments shall be treated as missing data: if one argument is a NaN and the other numeric, then these functions shall choose the numeric value.

Upon successful completion, these functions shall return the maximum numeric value of their arguments.

[MX] If just one argument is a NaN, the other argument shall be returned.

If and are NaN, a NaN shall be returned.

No errors are defined.

None.

None.

None.

None.

fdim(3), fmin(3)

XBD <math.h>

First released in Issue 6. Derived from the ISO/IEC 9899:1999 (“ISO C99”) standard.

Austin Group Interpretation 1003.1-2001 #007 is applied.

January 31, 2018 posix.fail