// Zeinalipour-Yazti Demetrios
// csyiazti
// cs10xx - 
// Lab Sec#25-#39
// lab5
	/*		
	 * This  program asks the user for two integers. 
	 * The user should also specify "even" or "odd". 
	 * It then outputs all the specified types of numbers within the range.	       
	 */

#include <iostream>
using namespace std;

/* This function asks the user to input the value: valuename[].  
 * @return : the selected value
 */
int getValue(char valuename[])
{    /* defining local scope variables*/
     int value;
     
     cout << "Please type the \"" << valuename << "\" of the range: ";
     cin >> value;
    	
     return value;
}

/* This function asks the user to select the type "odd" or "even" 
 * @return : 1 for odd
 *           2 for even
 */
int getType()
{    /* defining local scope variables*/
     int value;

     /*  Getting the value */
     while (true) //start while1a
     {
    	  cout << "Please select the type: 1 or 2 (1=odd, 2=even)  : ";
    	  cin >> value;
    	  if (value==1 || value==2)
    		{ break; }
    	  else
    	  	{ cout << "Error# - You can only select 1 or 2 !" << endl; }
     }	//end while1a
     return value;
}


void main()
{
	/* define variables */
	int start, end;     /* range start and end                  */
	int type;			/* defines the type : (1=odd or 2=even) */

	/* define functions & procedures*/
	int getValue(char valuename[]); /* returns the  value given by the user  */
	int getType();              	/* returns the type 1 or 2 (1=odd,2=even)*/
	
	/* make sure that the end range is greater than the start range*/
	start = getValue("start");
    end = getValue("end");
	if (end < start)
		{  cout << "\nSwapping \"start\" with \"end\" ==> start = " 
			    << end << " , end = " << start << endl << endl; 
		   int temp = end;
		   end = start;
		   start = temp;
		}
	
	/* get the type from the user [1 or 2] (1=odd, 2=even) */
	type = getType();
	
	/* print out the result*/	
	for (int i=start; i<=end ; i++)
	{
		if ( (type==2) && (i%2==0) )
			{  cout << i << endl; }
		else if  ( (type==1) && (i%2!=0) )
			{  cout << i << endl; }
	}

}