Working variables

(Display Listing 7.)

The program declares and initializes the following working variables that are used in the algorithm:

• grade - Used to capture input grade value from user.  Initial value is immaterial.
• sum - Used to compute the sum of all the grade values.  Initial value of zero is critical to the success of the program.
• count - Used to keep track of the number of grades entered.  Initial value of zero is critical to the success of the program.
• avg - Used to store the average computed as the sum divided by the count.  Initial value is immaterial.