Other Aliasfmax, fmaxl
double fmax(double x, double y);
float fmaxf(float x, float y);
long double fmaxl(long double x, long double y);
These functions shall determine the maximum numeric value of their arguments. 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.
If just one argument is a NaN, the other argument shall be returned.
If x and y are NaN, a NaN shall be returned.
No errors are defined.
The following sections are informative.
COPYRIGHTPortions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .