Answer
See the explanation
Work Step by Step
To construct a sequential file containing information about a magazine's subscribers using a text file as the underlying structure, you would typically organize the data in a structured format. Each line in the text file could represent a subscriber's information, with different fields separated by a delimiter such as commas or tabs.
For example, each line could contain fields like subscriber ID, name, address, subscription start date, subscription end date, etc. These fields would be separated by commas or tabs.
Here's a simple example of how the text file might look:
```
SubscriberID,Name,Address,SubscriptionStartDate,SubscriptionEndDate
1,John Doe,123 Main St,2024-01-01,2025-01-01
2,Jane Smith,456 Elm St,2024-02-15,2025-02-15
3,Bob Johnson,789 Oak St,2024-03-10,2025-03-10
```
This format allows for easy reading and writing of subscriber information, and it can be sequentially accessed by reading each line of the text file.
