C++ pieces

standard lib

fmax

double fmax (double x, double y);
float fmax (float x, float y);
long double fmax (long double x, long double y);
double fmax (Type1 x , Type2 y);       // additional overloads

Maximum value
Returns the larger of its arguments: either x or y.
If one of the arguments in a NaN, the other is returned.

转载于:https://www.cnblogs.com/jerrywossion/p/7110290.html