c/c + + template and STL small example series < 1 > self bui lt Array

The self built Array provides the following external interfaces

The following code uses the private element size1, which was originally intended to be named by size, but because the int size() method is declared in the public method, it can't be compiled, so it's strange to call size1.

my_array.h

ifndef __my_array__
#define __my_array__
template<typename T, int n>
class Array {
public:
  Array();
  Array(int length);
  ~Array();
  T& get(int idx);
  T& operator[](int idx);
  void set(T data, int idx);
  int size();
private:
  T* pt;
  int size1;

};
//Constructor
template<typename T, int n>
Array<T, n>::Array(){
  pt = new T[n];
  size1 = n;
}
//Constructor
template<typename T, int n>
Array<T, n>::Array(int length){
  pt = new T[length];
  size1 = length;
}
//Destructor
template<typename T, int n>
Array<T, n>::~Array(){
  delete [] pt;
}
//Get the number of array elements
template<typename T, int n>
int Array<T,n>::size(){
  return size1;
}
//Gets the element with the specified subscript
template<typename T, int n>
T& Array<T, n>::get(int num){
  if(num >= size1 || num < 0){
    //abnormal                                                      
  }
  else{
    return pt[num];
  }
}
//Sets the value of the specified subscript element
template<typename T, int n>
void Array<T, n>::set(T data, int num){
  if(num >= size1 || num < 0){
    //abnormal                                                      
  }
  else{
    pt[num] = data;
  }
}
//Overloaded [] function of element type
template<typename T, int n>
T& Array<T, n>::operator[](int num){
  if(num >= size1 || num < 0){
    //abnormal                                                      
  }
  else{
    return *(pt + num);
  }
}
#endif

Test procedure:

#include <iostream>
#include <string>
#include "my_array.h"

using namespace std;

int main(){
  Array<int, 5> ary;
  for(int i = 0; i < ary.size(); ++i){
    ary.set(i * 10, i);
    cout << ary.get(i) << " ";
    cout << ary[i] << ", ";
  }
  cout << endl;

  Array<string, 3> asr(4);
  for(int i = 0; i < asr.size(); ++i){
    asr.set("AAA", i);
    cout << asr.get(i) << " ";
    cout << asr[i] << ", ";
  }
  cout << endl;
  return 0;
}