// overload8.cpp	By: Aiman Hanna -  ©1993-2006 Aiman Hanna
//
// This program shows how operator overloading should be implemented, so that the 
// overloaded operator behaves, as well as can be used, in a very similar ways to
// the original operator implemented by the standard language. 
// As the "+" operator is implemented now, it is possible to write a statement that
// includes:  "v1 + v2 + v3 + v4;"  where v1, v2, v3 and v4 are all Vehicle objects. 
//
//	Key Points: 	1) Operator overloading. 
//			2) "static" objects. 
//

#include "overload8.h"



// Free function that overloads the "+" operator. 
Vehicle& operator+ (const Vehicle& vec1, const Vehicle& vec2)
{
	static Vehicle tempvec;

	tempvec.price = vec1.price + vec2.price;
	return tempvec;

}



// Free function that overloads the iostream "<<" operator. 

ostream& operator<< ( ostream& os, Vehicle& vec )
{
	os << vec.price << "$." << endl;
 
	return os;
 
}



Vehicle::Vehicle( int nd, double mxspd, double pr )
{
	numdoors = nd;
	maxspeed = mxspd;
	price = pr;

}




int Vehicle::GetNumDrs( void )
{
	return numdoors;
}



void Vehicle::SetNumDrs( int nd )
{
	numdoors = nd;
}




double Vehicle::GetmaxSpeed( void )
{
	return maxspeed; 
}



void Vehicle::SetMaxSpeed( double mxspd)
{
	maxspeed = mxspd;

}



double Vehicle::GetPrice( void )
{
	return price;

}



void Vehicle::SetPrice( double pr )
{
	price = pr;

}




void Vehicle::ShowInfo( void )
{
	cout << " The vehicle has " << numdoors << " doors, " << maxspeed 
         << " KM maximum speed, and its price is " << price << "$." << endl << endl;

}




int main()
{
	Vehicle v1(2, 180, 3000), v2(3, 220, 4000), v3(3, 220, 5000), v4(2, 200, 6000);
 

	cout << "\n Here is the information of v1: " << endl;
	cout << " ============================== " << endl;
	v1.ShowInfo();

	cout << "\n Here is the information of v2: " << endl;
	cout << " ============================== " << endl;
	v2.ShowInfo();

	cout << "\n Here is the information of v3: " << endl;
	cout << " ============================== " << endl;
	v3.ShowInfo();

	cout << "\n Here is the information of v4: " << endl;
	cout << " ============================== " << endl;
	v4.ShowInfo();


 
	cout << "\n The total price of v1 and v2 is: " << v1 + v2  << endl;
 
	cout << "\n The total price of v1, v2 and v3 is: " << v1 + v2 + v3 << endl;
  
	cout << "\n The total price of v1, v2, v3 and v4 is: " << v1 + v2 + v3 + v4 << endl;

	cout << "\n The total price of v1, v3 and v4 is: " << v1 + v3 + v4 << endl;


	return 0;
}


// The result of running the program 
/*

 Here is the information of v1:
 ==============================
 The vehicle has 2 doors, 180 KM maximum speed, and its price is 3000$.


 Here is the information of v2:
 ==============================
 The vehicle has 3 doors, 220 KM maximum speed, and its price is 4000$.


 Here is the information of v3:
 ==============================
 The vehicle has 3 doors, 220 KM maximum speed, and its price is 5000$.


 Here is the information of v4:
 ==============================
 The vehicle has 2 doors, 200 KM maximum speed, and its price is 6000$.


 The total price of v1 and v2 is: 7000$.


 The total price of v1, v2 and v3 is: 12000$.


 The total price of v1, v2, v3 and v4 is: 18000$.


 The total price of v1, v3 and v4 is: 14000$.
 
*/