// Specification file for the MyString class
#ifndef MYSTRING_H
#define MYSTRING_H
#include <iostream>
 
using namespace std;
 
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:
	MyString()					// Default constructor
		{ str = NULL; len = 0; }
 
	MyString(MyString &right)	// Copy constructor
		{ str = new char[right.length() + 1];
		  strcpy(str, right.getValue());
		  len = right.length(); }
 
	MyString(char *sptr)		// Constructor - initializes with
		{ len = strlen(sptr);	// a C-string.
		  str = new char[len + 1];
		  strcpy(str, sptr); }
 
	~MyString()					// Destructor
		{ if (len != 0) delete [] str; }
 
	int length()				// Returns the string length.
		{ return len; }
 
	char *getValue()			// Returns the string.
		{ return str; };
 
	// Overloaded operators
	MyString operator+=(MyString &);
	char *operator+=(const char *);
	MyString operator=(MyString &);
	char *operator=(const char *);
	int operator==(MyString &);
	int operator==(const char *);
	int operator!=(MyString &);
	int 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 *);
	friend ostream &operator<<(ostream &, MyString &);
	friend istream &operator>>(istream &, MyString &);
};
 
#endif

//Month class
 
#ifndef MONTH_H
#define MONTH_H
#include "MyString.h"
#include <iostream>
using namespace std;
 
class Month 
{ 
private: 
    MyString name; 
    int monthNumber; 
public: 
    Month() 
    { monthNumber = 1; 
    name = "January"; 
    } 
 
    Month(char *month_pointer) 
    { 
        name = month_pointer; 
        if (month_pointer == "January") 
            monthNumber = 1; 
        else if(month_pointer == "February") 
            monthNumber = 2; 
        else if(month_pointer == "March") 
            monthNumber = 3; 
        else if(month_pointer == "April") 
            monthNumber = 4; 
        else if(month_pointer == "May") 
            monthNumber = 5; 
        else if(month_pointer == "June") 
            monthNumber = 6; 
        else if(month_pointer == "July") 
            monthNumber = 7; 
        else if(month_pointer == "August") 
            monthNumber = 8; 
        else if(month_pointer == "September") 
            monthNumber = 9; 
        else if(month_pointer == "October") 
            monthNumber = 10; 
        else if(month_pointer == "November") 
            monthNumber = 11; 
        else if(month_pointer == "December") 
            monthNumber = 12; 
    } 
 
    Month(int x) 
    { 
        monthNumber = x; 
		switch (monthNumber)
		{
        case 1: 
            name = "January"; 
			break;
        case 2: 
            name = "February";
			break;
        case 3: 
            name = "March"; 
			break;
        case 4: 
            name = "April"; 
			break;
        case 5: 
            name = "May"; 
			break;
        case 6:  
            name = "June"; 
			break;
        case 7: 
            name = "July"; 
			break;
        case 8: 
            name = "August"; 
			break;
        case 9: 
            name = "September"; 
			break;
        case 10: 
            name = "October"; 
			break;
        case 11: 
            name = "November"; 
			break;
        case 12: 
            name = "December"; 
			break;
    } 
 
    void setmonthName(char *month_pointer) 
    { name = month_pointer;} 
 
    void setmonthNumber(int x) 
    { monthNumber = x;} 
 
    MyString getmonthName() 
    { return name;} 
 
    int getmonthNumber() 
    { return monthNumber;} 
 
    Month operator++() 
    { 
        ++monthNumber; 
        if(monthNumber == 13) 
            monthNumber = 1; 
        //Month(); 
        return *this; 
    } 
 
    Month operator++(int) 
    { 
        Month temp(monthNumber); 
        monthNumber++; 
        if(monthNumber == 13) 
            monthNumber = 1; 
        Month(monthNumber); 
        return temp; 
    } 
 
    Month operator--() 
    { 
        --monthNumber; 
        if(monthNumber == 0) 
            monthNumber = 12; 
        Month(); 
            return *this; 
    } 
 
    Month operator--(int) 
    { 
        Month temp(monthNumber); 
        monthNumber--; 
        if(monthNumber == 0) 
            monthNumber = 12; 
        Month(); 
            return temp; 
    } 
 
}; 
 
ostream &operator << (ostream &strm, MyString &obj) 
{ 
    strm << obj.getmonthNumber << " is the number of the month." << endl; 
    strm << obj.getmonthName << " is the name of the month." << endl; 
    return strm; 
} 
 
istream &operator >> (istream &strm, MyString &obj) 
{ 
    int x; 
    cout << "Enter the month number: "; 
    strm >> x; 
    obj.setmonthNumber(x); 
    return strm; 
} 
 
#endif

 
//main program.cpp
 
 
// Chapter 14
// Programming Challenge 4: Month Class
#include <iostream>
#include "Month.h"
#include "MyString.h"
using namespace std;
 
int main()
{
 
	// Create a Month object
	Month m("October");
 
	cout << m.getmonthName() << endl;
	cout << m.getmonthNumber() << endl << endl;
 
	m.setName("July");
	cout << m.getmonthName() << endl;
	cout << m.getmonthNumber() << endl << endl;
 
	m.setNumber(2);
	cout << m.getmonthName() << endl;
	cout << m.getmonthNumber() << endl << endl;;
 
	// Test the prefix ++ operator.
	cout << ++m << endl;
 
	// Test the postfix ++ operator.
	cout << m++ << endl;
	cout << m << endl << endl;
 
	// Test the prefix -- operator.
	cout << --m << endl;
 
	// Test the postfix ++ operator.
	cout << m-- << endl;
	cout << m << endl << endl;
 
	return 0;
}

std::string months[] = { "January","February" ...}
// assume n >= 1 and n <= 12
string getMonthName(int n) {return months[n-1];}