Finding the Number of Records in a File
Finding the Number of Records in a FileThe easiest way to determine the number of records in a file is to use a Verify node with Match set to a value you know is not in the file and the Store Index in Register checkbox selected (with a register specified for storing the index value). Since it won’t find a match, the program will return the file size, storing it in the index register.
Another method copies a known value to the end of the file, uses a Verify node to locate it, and then subtracts 1 from the Location Index. Tip07.scr, illustrated in Figure 120, demonstrates this method.
Figure 120. Tip07.scr Determines the Number of Records in a File
Display: Writes RECORDS= on the portable’s screen.
RECORDS
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