29. Is There Another Way to Save Files?

Use Random Files


This chapter shows you how to skip around in a file, reading and writing data as you go. The preceding chapter introduced methods you can use to write, read, or append data to a file. The problem is that once you open a sequential file for reading, you can only read it.

There might be times when you want to read a customer structure from disk and change the customer’s balance. You certainly wouldn’t want to have to create a new file just so you could write that one change. Instead, you would want to read the customer ...

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