I use std::min_element on this Node object I created that has an index. I have a std::set container that holds 10 Nodes with different indices, and then I call std::min_element to get the Node with the lowest index number.
#include <iostream>
#include <string>
#include <algorithm>
#include <set>
using namespace std;
class Node
{
public:
Node(int index) : _index(index) {}
int index() const { return _index; }
inline bool operator< (const Node &right) { return this->index() < right.index(); }
private:
int _index;
};
int main()
{
set<Node*> s;
for(int i = 10; i > 0; i--) //10 , 9 , 8 ...
s.insert(new Node(i));
Node *lowest = *min_element(s.begin(), s.end());
cout << lowest->index() << endl;
//free
for(set<Node*>::iterator iter = s.begin(); iter != s.end(); iter++)
delete *iter;
system("pause");
return 0;
}
The output is 10
but sure be 1
. What am I doing wrong?