// ptr15.cpp 		By: Aiman Hanna -  ©1993-2006 Aiman Hanna

// This program finds the car with the shortest model name.
// It is the correct version of ptr14.cpp.

#include "ptr13.h"

car::car(int doors, int cyl)
{		  
  num_doors = doors;
  num_cyl = cyl;
}


char* car::GetModel() 
{
 return car_model;
}


void car::SetModel(char* mdl) 
{
 car_model = mdl;
}


void car::SetColor( avail_colors col)
{
 car_color = col;
}


char* car::GetColor()
{
 switch (car_color)
 {
 	case white: return "white";  
 	case black: return "black"; 
 	case green: return "green";  
 	case red:   return "red";  
 }
  return "Unknown";
}




int car::GetNumCyl()
{
	return num_cyl;
}




void car::SetNumCyl(int nc)
{
	num_cyl = nc;
}



int main()
{

car *car_ptr = new car[3], *tmp_ptr;		// Declare 3 car objects
// Intialization.. done manually here.

tmp_ptr = car_ptr;

car_ptr -> SetModel( "BMW" );
car_ptr -> SetColor( green );

car_ptr++;

 car_ptr  -> SetModel( "VW" );
 car_ptr  -> SetColor();

car_ptr++;

 car_ptr -> SetModel( "BENZ" );
 car_ptr -> SetColor( black );

 car_ptr = tmp_ptr;		// Set it back to its initial place.

// Find the car with the shortest model name.
// Watch the use of "tmp_ptr". Also, find whether we are keeping track of original 
// position of car_ptr any more.

			// Assume the first car has the shortest model name
			// This is the object that is pointed by 
 
  	for (int i = 1; i < 3 ; i++)
	{ 
	tmp_ptr++;
		if ( strlen(tmp_ptr -> GetModel()) < strlen(car_ptr -> GetModel()) )
		{
		        car_ptr = tmp_ptr;	
			
		}
	}
  cout << " The shortest model name for all the existing car objects is: " 
						<<  car_ptr -> GetModel() << "\n";
  return 0;
}                               




// The following is the result of compilation
// Compilation successful

// The following is the result of running the program.

/*
  The shortest model name for all the existing car objects is: VW

*/