FixedBuffer Class Template

#include <iostream>
using namespace std;

template<typename T, size_t N>
class FixedBuffer {
    private:
        T data[N];
        size_t currentSize;

    public:
        FixedBuffer() : currentSize(0) {}

        void push( T v){
            if(currentSize < N){
                data[currentSize]= v;
                currentSize++;
            }
        }

        size_t size() const{
            return currentSize;
        }

        T operator[] (size_t i) const{
            return data[i];
        }

};

int main() {
   int n;
   cin >> n;
   FixedBuffer<int, 10> buf;  // max 10 elements
   for (int i = 0; i < n; i++) {
       int v;
       cin >> v;
       buf.push(v);
   }
   cout << "Buffer size: " << buf.size() << "\n";
   for (size_t i = 0; i < buf.size(); i++) {
       cout << buf[i] << " ";
   }
   cout << "\n";
   return 0;
}