Sorting a vector

[whitenite1]

The following is my vector. I have 118 of them, one for each element in the periodic table. How could I sort them as needed, if I want to display them alphabetically, or by the atomic number, depending on which the user chooses? Right now, I display the elements alphabetically in a list onscreen, but would also like to be able to display them according the the atomic numbers, is so desired.

struct Element
{
	int Atomic_Number;
	int x;// To display onscreen, using gotoXY(x,y);
	int y;
	string Symbol;
	string Name;
	double Atomic_Weight;
	float Melting_Point;
	float Boiling_Point;
	double Density;
	int Discovery_Year;
	double Ionization_Energy;
	int Element_Type;
	int Element_State;
};

Thanks for any help

[mutexe]

http://stackoverflow.com/questions/15185797/c-sort-a-vector-of-vector-of-strings-with-comparator-please-help-me-understan

look at the comparator stuff in that example.
pass your compare function into sort method:
http://www.cplusplus.com/reference/algorithm/sort/

[Peter87]

You can use std::sort and use different comparison functions for each way of sorting.

bool cmpElementsAlphabetically(const Element& e1, const Element& e2)
{
	return e1.Name < e2.Name;
}

bool cmpElementsAtomicNumber(const Element& e1, const Element& e2)
{
	return e1.Atomic_Number < e2.Atomic_Number;
}

// sort alphabetically
std::sort(elem_vec.begin(), elem_vec.end(), cmpElementsAlphabetically);

// sort by atomic number
std::sort(elem_vec.begin(), elem_vec.end(), cmpElementsAtomicNumber);

[whitenite1]

@mutexe

Thanks for the link. I'll save the page so I can get back to it to refresh my memory, if/when I do another program with vectors, and need to manipulate them.

@Peter87

Thanks for the help. I didn't think it would be that easy to sort the vector in those ways. After adding in #include <algorithm> , it worked like a charm. Thanks again..