We reviewed boolean logic tables

We reviewed boolean logic tables.

If A and B are boolean variables, then consider:

AND -- A && B

AND		B
AND		F	T
A	F	F	F
A	T	F	T

Both A and B must be true to get a true result.

OR -- A || B

OR		B
OR		F	T
A	F	F	T
A	T	T	T

Either A and B must be true to get a true result - so if you have at least one true, then the result will be true.

NOT -- !A

NOT	A	!A
	F	T
	T	F

Not gives you the inverse (opposite), and it only takes one variable (whereas AND and OR take 2).

The following code was built in class today (9/13/07). The commented part was done first and can be put back in to see an example of how true/false booleans work. Notice that it only gives you one try and guessing, so next week (based upon Chapter 5 content), we'll add the idea of repeating the guessing.

using System;
using System.Collections.Generic;
using System.Text;

namespace _303_fall_07_lecture__07
{
    class Program
    {
        static void Main(string[] args)
        {
            //bool A, B;
            //A = false;
            //B = false;

            //if (A == true)
            //{
            //    Console.WriteLine("1");
            //}
            //else
            //{
            //    if (B)
            //    {
            //        Console.WriteLine("2");
            //    }
            //    else
            //    {
            //        Console.WriteLine("3");
            //    }
            //}

            //Console.Write("Press ENTER to end the program");
            //Console.ReadLine();

            int magic_number = 13;
            int guess;

            Console.Write("Please enter a number between 1 and 100: ");
            guess = Convert.ToInt32(Console.ReadLine());

            if (guess == magic_number)
            {
                Console.WriteLine("You got it!");
            }
            else if (guess < magic_number)
            {
                Console.WriteLine("You should guess higher");
            }
            else  // not really necessary to test if (guess > magic_number) b.c we know
            {
                Console.WriteLine("You should guess lower");
            }
        }
    }
}