实现一个可以用于bind2nd的函数对象

template<typename T>
class Mulitiplies:public binary_function<T,T,T>
{
	public:
		Mulitiplies(){}
		~Mulitiplies(){}
		T operator()(T x,T y) const
		{
		    return x*y*3.14159265;
		}
};

int main()
{
    vector<double> vecs_int;
    for(double i=0;i<20;i++)
    {
        vecs_int.push_back(i);
    }
    list<double> lits_int;
    try
    {
        vecs_int.at(23);
    }
    catch(out_of_range &ot)
    {
        cout<<ot.what()<<endl;
    }
    //copy(vecs_int.begin(),vecs_int.end(),back_inserter(lits_int));
    transform(vecs_int.begin(),vecs_int.end(),back_inserter(lits_int),bind2nd(Mulitiplies<double>(),4));
    copy(lits_int.begin(),lits_int.end(),ostream_iterator<double>(cout," "));
	return 0;
}