nexttoward(x,y)函数详解

float nexttoward(float from, long double to);
 double nexttoward(double from, long double to);
long double nexttoward(long double from, long double to);
double nexttoward(integral from, long double to);

#include <iostream>  
#include<math.h>  
using namespace std;  
  
int main()  
{  
        long double from=0.0;  
        double to= -1.0;  
        cout<<"Values of from and to are:"<<from<<", "<<to<<'\n';  
        cout<<nexttoward(from,to);  
        return 0;  
}