一个模仿内建数组的小例子

#include<iostream>
using namespace std;
template<typename T>
class CArray
{
public:
CArray():m_size(0),m_data(NULL){}
CArray(size_t size):m_size(size),m_data(new T[size+1]()){}
~CArray()
{
if(m_data)
{
delete []m_data;
m_data = NULL;
}

}
public:
T &operator [](int i)
{
if(i >=m_size || m_data == NULL)
throw "error";
return m_data[i];

}
const T& operator [](int i)const
{
if(i>= m_size || m_data == NULL)
throw "error";

return m_data[i];
}

operator T *const(){ return m_data;}
operator const T*const() const {return m_data;}

private:
CArray(const CArray&){}
CArray &operator = (const CArray &);
private:
size_t m_size;
T *m_data;

};

int main()
{

CArray<int> a(3);
a[0] = 1;
*(a+1) = 2;
cout<<a[0]<<endl;
cout<<a[1]<<endl;
cout<<a[2]<<endl;

}