sort vector c++

/* Antonio Villanueva
C++ class uses the bubble method
to sort a vector without using sort
sorts numbers or letters*/

#include <iostream>
#include <vector>
using namespace std;

template <typename T>
class Ordena {

    public:
    Ordena (vector <T> &v) : v(v){};
    void ordenaElementos(){//sort vector public
        ordenaE();
    }

    void printVector (){//print vector
        for (const T &elem:v){
            cout <<elem<<" ";
        }
        cout <<endl;
    }

    private:
    vector<T>& v;

    void swapElems (int x,int y){//swap elems
        T tmp;
        tmp=v[x];
        v[x]=v[y];
        v[y]=tmp;
    }

    void ordenaE(){ //sort a vector
        for (size_t x=0 ;x < v.size();x++){
            for (size_t y=0 ;y < v.size();y++){
                if ( v[x] < v[y] ){
                    swapElems(x,y);
                }
            }
        }
    }


};

int main(void)
{
    //Test of a numeric vector
    //vector <int> v {3,5,1,8,7};
    //Ordena <int> o(v);

    //Test of a  char vector
    vector <char> v {'x','a','y','b','w'};
    Ordena <char> o(v);

    o.ordenaElementos();
    o.printVector();

    //test the local version of the vector
    for (const auto &elem:v){
        cout<<elem<<" ";
    }
    return 0;
}