[求助][急]链表排序..

struct Node{
    double h;
    double w;
    Node(){}
    Node(double hh,double ww){h=hh;w=ww;}
};

ostream& operator << (ostream& out,const Node& t)
{
    return out<<t.h<<\"\t\"<<t.w;
}

struct less_h:binary_function<Node,Node,bool>{
    bool operator () (const Node& a,const Node& b){
        return a.h<b.h;
    }
};

struct less_w:binary_function<Node,Node,bool>{
    bool operator () (const Node& a,const Node& b){
        return a.w<b.w;
    }
};

template <class T>
void out(T* arr,size_t n)
{
    for(int i=0;i<n;i++){
        cout<<arr[i]<<endl;
    }
    cout<<endl;
}

int main()
{
    Node arr[3]={Node(180.5,55),Node(172,74),Node(160,65)};

    cout<<\"Before sort\"<<endl;
    out(arr,3);

    cout<<\"Sort by height\"<<endl;
    sort(arr,arr+3,less_h());
    out(arr,3);

    cout<<\"Sort by weight\"<<endl;
    sort(arr,arr+3,less_w());
    out(arr,3);
}