a. The Willmington Walking Club maintains a master file that contains a record for each of its members. Fields in the master file include the walker% ID number, first name, last name, and total miles walked to the nearest one-tenth of a mile. Every week, a transaction file is produced. It contains a walker's ID number and the number of miles the walker has logged that week. Each file is sorted in walker ID number order. Design the logic for a program that matches the master and transaction file records and updates the total miles walked for each dub member by adding the current week's miles to the cumulative total. Not all walkers submit walking reports each week. The output is the updated master file and an error report that lists any transaction records for which no master record exists.
b. Modify the walking club program to output a certificate of achievement each time a walker exceeds the 500-mile mark. The certificate, which contains the walker's name and an appropriate congratulatory message, is output during the execution of the update program when a walker's mile total surpasses 500.
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