#ifndef MYSTRING_H
#define MYSTRING_H

#include <iostream>
#include <cstring>      // For string library functions
#include <cstdlib>      // For exit() function
using namespace std;

// The following declarations are needed by some compilers
class MyString;         // Forward declaration
ostream &operator<<(ostream &, MyString &);
istream &operator>>(istream &, MyString &);

// MyString class: An abstract data type for handling strings
class MyString
{
  private:
    char *str;
    int len;
  public:
    // Default constructor.
    MyString()
    {
        str = 0;
        len = 0;
    }

    // Convert and copy constructors.
    MyString(char *);
    MyString(MyString &);

    // Destructor.
    ~MyString()
    {
        if (len != 0)
        delete [] str;
        str = 0;
        len = 0;
    }

    // Various member functions and operators.
    int length() { return len; }
    char *getValue() { return str; };
    MyString operator+=(MyString &);
    MyString operator+=(const char *);
    MyString operator=(MyString &);
    MyString operator=(const char *);
    bool operator==(MyString &);
    bool operator==(const char *);
    bool operator!=(MyString &);
    bool operator!=(const char *);
    bool operator>(MyString &);
    bool operator>(const char *);
    bool operator<(MyString &);
    bool operator<(const char *);
    bool operator>=(MyString &);
    bool operator>=(const char*);
    bool operator<=(MyString &);
    bool operator<=(const char *);

    // Overload insertion and extraction operators.
    friend ostream &operator<<(ostream &, MyString &);
    friend istream &operator>>(istream &, MyString &);
};
#endif