//      File name:      assign7a.cpp
//      Author:         Benjamin Freeman
//      Instructor:     Dr. John Wang
//      Due date:       Wed., Apr. 9, 2008
//      Compilation:    g++ assign7a.cpp -o assign7a.out
//      Execution:      ./assign7a.out
//
//      Goal: This program will allow the user to perform the following operations:
//	insert a string to the vector, delete the last string, sort the vector to ascending order, 
//	sort it to descending order, print the number of the strings in the vector, 
//	reverse the strings order in the vector, empty the vector.

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

void menu ();
void process ( char);

int main()
{
	char ch;
	menu();
	cin >> ch;
	while ( tolower(ch) != 'h' )
	{
		process(ch);
		menu(); 
		cin >> ch;
	}
	cout << "\n----------------------------------" << endl;
	cout << "Thanks for using the program, bye" << endl;
	cout << "----------------------------------" << endl;
	getchar();
	return 0;
}

void menu ()
{
	cout << "-------------------------------------\n";
	cout << "Welcome to the word storage program\n";
	cout << "-------------------------------------\n";
	cout << "a: insert a word\n";
	cout << "b: delete the last word\n";
	cout << "c: sort the list in ascending order\n";
	cout << "d: sort the list in decscending order\n";
	cout << "e: print the number of words in the list\n";
	cout << "f: reverse the order of the words\n";
	cout << "g: empty the list\n";
	cout << "h: quit the program\n";
	cout << "\nChoose your operation: ";
}

void process ( char ch)
{
	string s1;
	vector<string> data;
	char dummy;
	switch ( tolower(ch) )
	{ 
		case 'a':
			cout << "Input a word: ";
			cin >> s1;
			data.push_back(s1);
			cout << "Size is: " << data.size() << endl;
			cout << "The list is:\n";
			for ( int k = 0; k < data.size(); k++ )
                        	cout << data[k] << endl;
			getchar();
			break;

		case 'b':
			data.pop_back();
			cout << "The list is now:\n";
			for ( int k = 0;  k < data.size(); k++ )
                        	cout << data[k] << endl;
			getchar();
			break;
		case 'c':
			sort(data.end(), data.begin(), greater<string>());	
			cout << "\nThe list in ascending order is:\n";
			for ( int k = 0; k < data.size(); k++ )
                        	cout << data[k] << endl;
			getchar();
			break;
		case 'd':
			reverse(data.end(), data.begin());
			cout << "\nThe list in descending order is:\n"; 
			for ( int k = 0; k < data.size(); k++ )
                                cout << data[k] << endl;
			getchar();
			break;
		case 'e':
			cout << "The number of words in the list is: " <<
			data.size();
			cout << endl;
			getchar();
			break;
		case 'f':
			reverse(data.begin(), data.end());
			cout << "The list has been reversed, it is now:\n";
			for ( int k = 0; k < data.size(); k++ )
                                cout << data[k] << endl;
			getchar();
			break;
		case 'g':
			data.clear();
			cout << "The list is now empty\n";
			getchar();
			break;
		default:
			cout << "\nInvalid input.\n" ;
			cout << "\n\nType any key to continue ..\n";
			getchar();
	}
	return;
}