C++ using Date and Textcomplex pro

Namespace Program

#include 

#include

#include 

using namespace std;

complex::complex(double real, double imag)

   : real(real), imag(imag) { }

double complex::getreal() const 

{

   return real;

}

void complex::setreal(double real) 

{

   this->real = real;

}

double complex::getImag() const 

{

   return imag;

}

void complex::setimag(double imag) 

{

   this->imag = imag;

}

void complex::setvalue(double real, double imag) 

{

   this->real = real;

   this->imag = imag;

}

void complex::print() const 

{

   cout << '(' << real << ',' << imag << ')' << endl;

}

bool complex::isreal() const 

{

   return (imag == 0);

}

bool complex::isimaginary() const 

{

   return (real == 0);

}

complex & complex::addinto(const complex & another) 

 {

   real += another.real;

   imag += another.imag;

   return *this;

}

complex & complex::addinto(double real, double imag) 

{

   this->real += real;

   this->imag += imag;

   return *this;

}

complex complex::addreturnnew(const complex & another) const 

{       

   return complex(real + another.real, imag + another.imag);

}

complex complex::addreturnnew(double real, double imag) const 

{

   return complex(this->real + real, this->imag + imag);

}

Test Complex

#include 

#include 

#include 

using namespace std;

int main() 

{

   complex c1, c2(4, 5);

   c1.print();  

   c2.print();  

   c1.setvalue(6, 7);

   c1.print();  

   c1.setreal(0);

   c1.setimag(8);

   c1.print();  

   cout << boolalpha;  

   cout << "Is real? " << c1.isReal() << endl;           

   cout << "Is Imaginary? " << c1.isImaginary() << endl; 

   c1.addinto(c2).addinto(1, 1).print();  

   c1.print();  

   c1.addreturnnew(c2).print();   

   c1.print();  

   c1.addreturnnew(1, 1).print(); 

   c1.print();  

}

Date

#include

#include

#ifndef date_h

#define date_h

#include 

using namespace std;

class date 

{

private:

   int year;    

   int month;   

   int day;     

   const static string str_months[];

   const static string str_days[];

   const static int days_in_months[];

   const static int year_min = 1753;

   const static int year_max = 9999;

public:

   static bool isleapyear(int y);

   static bool isvaliddate(int y, int m, int d);

   static int getdayofweek(int y, int m, int d);

   date(int y, int m, int d);

   void setdate(int y, int m, int d);

   int getyear() const;

   int getmonth() const;

   int getday() const;

   void setyear(int y);

   void setmonth(int m);

   void setday(int d);

   void print() const;

   date & nextday();

   date & previousday();

   date & nextmonth();

   date & previousmonth();

   date & nextyear();

   date & previousyear();

};