//
//	p 137
//	Abstract DT - List: array of items with var. length
//	read strings from a file and put them in the list, out the strings

#include <iostream>
using namespace std;

const int MAX = 50;

class List
{	int data[MAX];
	int length;
public:
	List()	{ length = 0;}
	int Length() const
	{	return length;	}
	void Insert(int item) 
	{	data[length] = item;
		length ++;
	}
	void Print() const
	{	for( int i=0; i<length; i++)
			cout << data[i] << " ";
		cout << "\n";
	}
	// sequential search, p139
	bool IsPresent(int item) const
	{	bool found = false;
		for(int i=0; i<length && !found; i++)
			if(data[i] == item) found = true;
		return found;
	}

	void SelectionSort() //p140 ascending order
	{
		int temp;
		int passCount;	
		int minIndex;
		for(passCount=0; passCount<length-1; passCount++)
		{	minIndex = passCount;
			for(int k=passCount+1; k<length; k++)
			{	if( data[minIndex] > data[k] )	minIndex = k;}
			temp = data[minIndex]; //swap
			data[minIndex] = data[passCount];
			data[passCount] = temp;
		}
	}
	void SelectionSort_R() //descending
	{
		int temp;
		int passCount;
                int maxIndex;
                for(passCount=0; passCount<length-1; passCount++)
                {       maxIndex = passCount;
                        for(int k=passCount+1; k<length; k++)
                        {       if( data[maxIndex] < data[k] )  maxIndex = k;}
                        temp = data[maxIndex]; //swap
                        data[maxIndex] = data[passCount];
                        data[passCount] = temp;
                }
        }

};

int main()
{
	
	List real;
	char op;
	int item;

	cout << "  List Operations\n";
	cout << "====================\n";
	cout << "I	Insert an item.\n";
	cout << "A	Ascending order.\n";
	cout <<	"Q       Quit.\n";
	cout << "--------------------\n";
	cout << "Your option is:  ";
	cin >> op;

	while (toupper(op) != 'Q')
	{	
		if (toupper(op) == 'I')
		{	cout << "Input the item  ";
			cin >> item;
			real.Insert(item);
			cout << "The list is - ";
			real.Print();
		}
		else if (toupper(op) == 'A')
		{	real.SelectionSort();
			cout << "The list is - ";
			real.Print();
		}
	cout << "  List Operations\n";
	cout << "====================\n";
        cout << "I      Insert an item.\n";
        cout << "A      Ascending order.\n";
        cout << "Q      Quit.\n";
        cout << "--------------------\n";
        cout << "Your option is:  ";
        cin >> op;

	}
	return 0;
}