//-----------------------------------------------------
//                  ---hw2.cpp---   
//                  ID#: 10164771
//   Edward Cory                      epcr2f@umr.edu
//   CS53                                  2-12-2003
//-----------------------------------------------------
//   This program tries to guess a number that a user
// enters that is between 1 & 100. It continues untill
// the correct number is guessed then prompts the user
// if they want to play again.
//-----------------------------------------------------
//   Revisions:
//
// v1.0 Initial build
//-----------------------------------------------------

#include <iostream>
using namespace std;
int main()
{
	//initialize variables

	int i_High, i_Low, i_NumGuess;
	char c_Again, c_GuessYHL;

	do
	{
	    i_High=100;
	    i_Low=1;
	
		cout << "Pick an integer from 1 to 100 and I will try to guess it. Respond with Y if my guess";
		cout << endl << "is right, H if it is too high, or L if my guess is too low." << endl << endl;

		// Following while loop contains all too high/low comments and math

		while (c_GuessYHL!='Y')
		{
			i_NumGuess = (i_High+i_Low)/2;
			cout << "Is your number " << i_NumGuess << "?" << endl;
			cin >> c_GuessYHL;
			
			// Following  requires the user to enter capital H/L/Y's
			
			while ((c_GuessYHL!='H') && (c_GuessYHL!='L') && (c_GuessYHL!='Y'))
			{
				cout << "I don't understand; please type Y, H, or L." << endl;
				c_GuessYHL='K';
				cin >> c_GuessYHL;
			};

			// Checks if computer guess was too high or low

			if (c_GuessYHL == 'H')
			{
				i_High = i_NumGuess--;
				cout << "Too high, huh. ";
			}

			if (c_GuessYHL == 'L')
			{
				i_Low = i_NumGuess++;
				cout << "Too Low, huh. ";
			}
		};

		// Checks if the user wants to play again

		cout << "I knew I could do it!" << endl << endl << "Do you want to play again? Type Y or N." <<endl;
		c_GuessYHL = 'g';
		cin >> c_Again;		

		while ((c_Again != 'N') && (c_Again != 'Y'))
		{
			cout << "I don't understand; please type Y or N." << endl;
			cin >> c_Again;
		};
	} while (c_Again == 'Y');

	return 0;
}