mystring.h

C++编成数据结构与程序设计方法 D.S.Malk编著

//Header file myString.h

#ifndef H_myString
#define H_myString

#include <iostream>

using namespace std;

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

public:
    const newString& operator=(const newString&); 
      //overload 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;

      //overload 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;   //variable to store the length 
                     //of the string
};

#endif