fmax(x,y)函数详解

float fmax(float x, float y);
double fmax(double x, double y);
long double fmax(long double x, long double y);
promoted fmax(Arithmetic x, Arithmetic y);

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
   double x=3.3;  
   float y=6.9;  
   std::cout <<"Values of x and y are :"<<x<<","<<y<< std::endl;  
   cout<<"Maximum value is :"<<fmax(x,y);  
    return 0;  
}  

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
   double x=1.3;  
   float y=NAN;  
   std::cout <<"Values of x and y are :"<<x<<","<<y<< std::endl;  
   cout<<"Maximum value is :"<<fmax(x,y);  
    return 0;  
}