boost封装函数指针

#include <iostream>
#include "boost/function.hpp"

double add(double a, double b)
{
std::cout<<a+b<<std::endl;
return (a + b);
}
double del(double a, double b)
{
std::cout<<(a - b)<<std::endl;
return (a - b);
}
int main()
{
boost::function<double (double, double)> func[2]={add, del};
(*func)(1,0);
(* (func+1))(4,2);
return 0;

}