11.4.cpp

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>
class Array
{
  public:
	Array(int i)
	{ 
		Length=i;
		Buffer=new char[Length];
	}
	~Array()
	{  delete []Buffer;  }
	int GetLength()
	{  return Length;  }
	char & operator [](int i);
  private:
	int Length;
	char *Buffer;
};
char & Array::operator [](int i)
{
	static char ch;
	if(i<Length&&i>=0)
		return Buffer[i];
	else
	{
		cout<<"\nIndex out of range.";
		return ch;
	}
}
void main()
{
	Array string1(6);
	char *string2="string";
	for(int i(0);i<8;i++)
		string1[i]=string2[i];
	cout<<endl;
	for(i=0;i<7;i++)
    	cout<<string1[i];
	cout<<endl;
	cout<<string1.GetLength()<<endl;
}