c++简单的动态数组实现

#include "iostream"

using namespace std;
template<class T>
class arry
{
	private:
			T *p;
			unsigned int size;
	public:
			arry(){}
			arry(unsigned int _size):size(_size){
				p=(T*)malloc(_size*sizeof(T));

			}
			void resize(){
				size+=1;
				p=(T*)realloc(p,size*sizeof(T));
			}
			T& operator[](int n){
				return *(p+n);
			}



};


int main()
{
	arry<int> A(3);
	A[0]=1;
	cout<<A[0]<<endl;		
	return 0;
}