Advanced Expressions
--------------------

I am going to start off with some simple expressions and slowly make them
harder and more complicated.  Here goes for values: a = 10 and b = 11

	a
	10

	Answer = 10

The next one uses some basic mathematical operations:

	a + 5
	10 + 5
	15

	Answer = 15

Let us add some more operations:

	a - b * 10 / 10
	10 - 11 * 10 / 10
	10 - 110 / 10
	10 - 11
	-1

	Answer = -1

Let us add parenthesis and modulus:

	a % (b - 5)
	10 % (11 - 5)
	10 % 6
	4

	Answer = 4

Next let us try adding conditions:

	a + b == b - 1
	10 + 11 == 11 - 1
	21 == 10
	0 since False

	Answer = 0

Now let's get really complicated:

	a = b == 5 - a + 6
	a = 11 == 5 - 10 + 6  (note the leftmost variable of an assignment
			       does gets assigned a value)
	11 == -5 + 6
	11 == 1
	0

	Answer = 0


Conditional Expressions
-----------------------

Moving on, let us head in a different direction.  Let's say we have an
if_else statement liek this:

	if( z == 20 )
	  y = 10;
	else
	  y = 30;

This whole statement may be reduce to a one line statement like this:

	y = (z == 20? 10:30);

This is equivalent to the above!  It first tests the "z == 20" condition.
If it is true, then the first element after the question mark gets assigned
to the variable y.  Otherwise the second value is assigned.


Casts
-----

These are not something you wear when you break a bone, these are a means
to change the type of variable into another type.  For example:

	int a = 10;
	float b = 20.5;

If you wanted to add these two, it may be suggested that you cast the
integer into a float when adding to be sure it doesn't round the floating
point number to an integer.  This may be done like this:

	float sum;

	sum = (float) a + b;

The (float) is a cast.  You could also go the other way:

	int sum;

	sum = a + (int) b;

Or you could do a whole expression like this:

	int a = 12, b = 13;
 	float c;

	c = (float)(a + b);