fdim(x,y)函数详解

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

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
   float x=9.4;  
   float y=8.3;  
   std::cout <<"Values of x and y are :"<<x<<","<<y<< std::endl;  
   cout<<"Positive difference between two numbers is :"<<fdim(x,y);  
    return 0;  
}  

#include <iostream>  
#include<math.h>  
using namespace std;  
int main()  
{  
   double x=3.3;  
   float y= 4.7;  
   std::cout <<"Values of x and y are :"<<x<<","<<y<< std::endl;  
   cout<<"Positive difference between two numbers is :"<<fdim(x,y);  
    return 0;  
}