Practice exercise -- Data types and values

                   
Categories of simple data types(scalars):

  Integral (int): 
    A data type for integers, or numbers without a decimal point.  
    Examples are 0, 127, -2147483648, +32767 (+ sign not required)

  Floating-point (double, float, short): 
    A data type for decimal numbers.
    Examples are: 0.0, 2.54, -3.21, 1.23E2 -4.56E0, 7.89E-1 

  Boolean (bool): this logical type is treated as an integral type in C++.
    Possible values are true, false.

  Character(char): 
    The smallest integral type, and is used to represent a single character.  
    For example: 'A', '$', '\t' (means tab--the backslash is termed an "escape"
    symbol).

    
For the value in the left column, place a check under the corresponding data 
type column:
   
Value          Integral     Floating        Boolean     Character    (invalid)
----------     --------     -----------     -------     ---------    ---------
-32768

3.14

false

'\n'

True

0 (zero)

O ("oh")

3.14E0

7.8F1

true

\t

' ' (space)


Define identifers for:
1.  a type int variable named celsiusFreezing initialized to 0;

2.  a double named pi equal to 3.14;

3.  a boolean named done initialized to false; and

4.  type char variables named space with value ' '; and newLine = '\n'.