SUMMER EXERCISE B   (30/7/2000)

                 Submit your programs to  mrjwong@email.com by 8/8/2000

1. Write a program using arrays to simulate the processing of electric bills 
   of an electric power company. The sample output is as follows:
   
   RUN
                      Menu
   (1) Enter monthly readings 
   (2) Search customer records 
   Choose a number for your choice.
   
   Choice : 1                      (input by user)
   
   Customer name : Abert Au        (input by user)
   Account number : 21356          (input by user)
   Billing month  : July 2000      (input by user) 
   Last month reading : 82386      (input by user)
   This month reading : 82441      (input by user)
   
   Electricity is charged at $8.83 per unit (kilo watt hour)
   
   Sample output

   Monthly Electric Bill
        
   Account number : 21356           
   Unit of electricity consumed this month : 55
   This month electric charge :  485.65
  
                       Menu
   (1) Enter monthly monthly readings
   (2) Search customer records 
   Choose a number for your choice.

   Choice : 2                (input by user)
   
   Account number : 12836    (input by user)
   
   Customer name : Peggy So    
   Account number : 12836
   Unit of electricity consumed this month : 60
   This month electric charge :  529.8
 
 
2. Describe the 5 stages of data processing in relation to 
   the customer services provided by an electric power company.