newstring.h

data+structures+using+c的源码

//Header file newString.h
#ifndef H_newString
#define H_newString
#include <iostream>

using namespace std;

class newString
{
		//Overloads the stream insertion and extraction operators
    friend ostream& operator<<(ostream&, const newString&);
    friend istream& operator>>(istream&, newString&);

public:
    const newString& operator=(const newString&); 
		//Overloads the assignment operator
    newString(const char *); 
		//constructor; conversion from the char string
    newString();  
		//default constructor to initialize the string to null
    newString(const newString&); 
		//copy constructor
    ~newString(); 
		//destructor

    char& operator[] (int);  
    const char& operator[](int) const;

		//Overloads the relational operators
    bool operator==(const newString&) const;
    bool operator!=(const newString&) const;
    bool operator<=(const newString&) const;
    bool operator<(const newString&)  const;
    bool operator>=(const newString&) const;
    bool operator>(const newString&)  const;

private:
    char *strPtr;   //pointer to the char array 
                    //that holds the string
    int strLength;  //data member to store the length 
					//of the string
};
#endif