Assignment 3.1

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1. What value does num2 contain if the following statements are executed?
   unsigned char num1, num2;
   num1=0xA5;
   num2=num1 & 0xF0;

Using & as an AND operator we get..
A5 = 1010 0101 (Hex to Binary)
F0 = 1111 0000 (Hex to Binary)
--------------
1010 000 = A0

2. What value does num2 contain if the following statements are executed?
   unsigned char num1, num2;
   num1=0x66;
   num2=num1 | 0xF0;

Using | as an OR operator we get..
66 = 0110 0110 (Hex to Binary)
F0 = 1111 0000 (Hex to Binary)
--------------
1111 0110 = F6

3. What value does num1 contain if the following statements are executed?
   unsigned char num1=0x79;
   num1&=0x0F;

Using &= as an AND operator we get..
79 = 0111 1001 (Hex to Binary)
0F = 0000 1111 (Hex to Binary)
--------------
0000 1001 = 09

4. What is a “WATCH” Window and why would you use it?

> Watch Window lets you know what is going on step-by-step (rather, memory execution by memory execution) or line by line of what your code/firmware is doing. [Fact: Since your code is held in non-volatile memory devices such as ROM, EPROM, or flash memory it is officially called a FIRMWARE. Software is what you get when you have a Kernel to Hardware translation happening.]

5 and 6) Write a simple C program using a while loop that will count up from 0 to 10. Single step through the program and look at your count variable in the WATCH window, as it counts. There's a bad-ass way to do this if you want to impress your friends at: (https://github.com/glennlopez/Cpp.Playground/blob/master/c%2B%2B%20tricks/whileLoop_decrementArgument.cpp)
It should be noted that "!=" should NOT be used at every iteration loop scenario. Use your jugement. >= or <= are sometimes better.

unsigned char glenn = 0;
while (glenn !=10)
{
glenn ++;
}

> unsigned char glenn = 10;
> while (glenn !=0)
> {
> glenn --;
> }

Bitwise operators can be tricky, if this doesnt help heres a video explaining what why are... http://youtu.be/HB0TFkQATBo