//***********************************************************************
// vigenere.cpp
//
// this is an implementation of the vigenere polyalphabetic cipher
// using the vigenere object class
//
// it encrypts plaintext and decrypts ciphertext
//
// INPUTS: (from disk file)
//		encryption: key, plaintext
//
//		decryption: key, ciphertext
//
// OUTPUTS: (to disk file)
//		encryption: ciphertext
//
//		decryption: plaintext
//
//			(to the screen)
//		main interaction menu
//
//***********************************************************************
//  WARNING:
//  this program requires 4 disk files on the A drive: key.txt, 
//  plaintext_in.txt, plaintext_out.txt. and ciphertext.txt
//
//***********************************************************************
// IMPLEMENTATION NOTE:
//  this program compiles with 4 instances of compiler warning C4786
//  when compiled in DEBUG mode
//
//  these warnings DO NOT affect the program - ignore them
//
//***********************************************************************
// created by: j. aleshunas
// created on: 8 may 02
// modified on: 19 jun 02
//
//***********************************************************************

#include "vigenere.h"

void main(void) {

	// the cipher instance for this session
	Vigenere_cipher vcclCipher_instance;

	// the bNot_finished flag controls the main menu loop
	bool bNot_finished = true;

	// the menu selection
	int iMenu_selection;

	// start a while loop toggled by the bNot_finished flag
	while(bNot_finished) { // infinite loop

		cout << endl;
		cout << " What do you want to do?" << endl;
		cout << endl;
		cout << "     1. Encrypt a message" << endl;
		cout << "     2. Decrypt a message" << endl;
		cout << "     3. Quit" << endl;
		cout << endl;
		cout << " Enter your selection --> ";
		cin >> iMenu_selection;
		cout << endl;

		// actions for each menu selection
		switch(iMenu_selection) {

			case 1: // encrypt the plaintext
				vcclCipher_instance.Encryption();
				break;

			case 2: // decrypt the ciphertext
				vcclCipher_instance.Decryption();
				break;

			case 3: // set the loop flag to quit looping
				bNot_finished = false;
				break;

			default: // display and error message for invalid menu selections
				cout << endl;
				cout << iMenu_selection << " is not a vaild menu selection";
				cout << endl;
				cout << "Please make a valid choice";
				cout << endl << endl;
		}// switch
	}// while
	return;  // that's all folks
}// main()