OOP Selection sort usimg template

#include<iostream>
using namespace std;

template<class T>
void selection(T a[],int n)
{
   T temp;
   int min,i,j;
   for(i=0;i<n-1;i++)
   {
     min=i;
     for(j=i+1;j<n;j++)
     {
       if(a[j]<a[min])
       {
         min=j;
       }
     }
      temp=a[i];
      a[i]=a[min];
      a[min]=temp;
    }
  cout<<"\n\t sorted array elements:\n\t\t";
  for(i=0;i<n;i++)
  cout<<a[i]<<"  ";
}


int main()
{
   int n,i,ch,ch1;
  
   do
   {
     cout<<"\t\n 1. int\t\t2.float";
     cout<<"\n\tenter u r choice:";
     cin>>ch;
   switch(ch)
   {
     case 1:
         cout<<"\n \t enter the size of array:";
         cin>>n;
         int x[n];
         cout<<"\n\tenter the array elements:";
         for(i=0;i<n;i++)
             cin>>x[i];
         selection(x,n);
          break;
      case 2:
          cout<<"\n \t enter the size of array:";
           cin>>n;
           float y[n];
           cout<<"\n\tenter the array elements:";
          for(i=0;i<n;i++)
              cin>>y[i];
          selection(y,n);
            break;
       default:
            cout<<"\n\tu r choice is wrong";
    }
   cout<<"\n\t do u want cont....press 1:";
    cin>>ch1;
  }while(ch1==1);
return 0;
}