C Program - Build an index file from another file

I have a .bin file that contains records in CSV format what I want to do is assign each record in the bin file a sequence number. 开发者_如何转开发 So the first record in the bin file would be assigned 0 and so on. These will be placed into a bianry index file such as (username, seq #).

If I have the bin file already created with records in it, how do I go through the bin file and index each record? Thanks for any help!

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You would read lines from file A, and write lines to file B. Keep a count of each line you read and use that to generate the sequence number column when writing to file B.

To be honest, I would probably use Excel or a spreadsheet app if the file is already in CSV format