- open the input file, checking for file-open error
- open the output files, checking for file-open errors
- for each line in the input file
- use a regex or split to see if it has the date you want
- write it to the appropriate output when appropriate
- close the files
Please try to do that yourself and if you have problems, feel free to come back and tell us which steps are giving you problems.
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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