array.h

这是C++的一部分练习程序!对初学者有一定的帮助作用。

#include <iostream.h>
#include <stdlib.h>
template <class T>
class array
{
	public:
		array(int i);
		~array()
		{  delete []a;  }
		T & operator[](int i);
	private:
		int length;
		T *a;
};
template <class T>
array <T>::array(int i)
{
	length=i;
	a=new T[i];
	if(!a)
	{
		cout<<"Can't allocate array.\n";
		abort();
	}
	for(int j=0;j<i;j++)
		a[j]=0;
}
template <class T>
T & array <T>::operator[](int i)
{
	if(i<0||i>length)
	{
		cout<<"\nIndex value of ";
		cout<<i<<" is out-of-bound.\n";
		abort();
	}
	return a[i];
}