C - C++ Templates - Default template arguments

#include<iostream>
 
using namespace std;
 
template<class T=int,int size=5>
class array
{
  T var[size];
  int i;
 
public:
  array()
  {
    for(i=0;i<size;i++)
      var[i]=i;
  }
 
  void display()
  {
    for(i=0;i<size;i++)
      cout<<var[i]<<"\n";
 
    cout<<"\nSize of variable:";
    cout<<sizeof(var);
  }
};
 
 
int main()
{
  array<int> a1;
  array<float,10> a2;
  cout<<"using int\n";
  a1.display();
  cout<<"\nusing float\n";
  a2.display();
  return 0;
}