97 lines
2.0 KiB
Markdown
97 lines
2.0 KiB
Markdown
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# Ocr Numbers
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Write a program that, given a 3 x 4 grid of pipes, underscores, and spaces, can determine which number is represented, or whether it is garbled.
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# Step One
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To begin with, convert a simple binary font to a string containing 0 or 1.
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The binary font uses pipes and underscores, four rows high and three columns wide.
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```
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_ #
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| | # zero.
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|_| #
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# the fourth row is always blank
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```
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Is converted to "0"
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```
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#
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| # one.
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| #
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# (blank fourth row)
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```
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Is converted to "1"
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If the input is the correct size, but not recognizable, your program should return '?'
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If the input is the incorrect size, your program should return an error.
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# Step Two
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Update your program to recognize multi-character binary strings, replacing garbled numbers with ?
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# Step Three
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Update your program to recognize all numbers 0 through 9, both individually and as part of a larger string.
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```
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_
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_|
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```
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Is converted to "2"
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```
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_ _ _ _ _ _ _ _ #
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| _| _||_||_ |_ ||_||_|| | # decimal numbers.
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||_ _| | _||_| ||_| _||_| #
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# fourth line is always blank
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```
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Is converted to "1234567890"
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# Step Four
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Update your program to handle multiple numbers, one per line. When converting several lines, join the lines with commas.
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```
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_ _
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_ _
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_ _ _
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```
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Is converted to "123,456,789"
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To run the tests simply run the command `go test` in the exercise directory.
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If the test suite contains benchmarks, you can run these with the `-bench`
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flag:
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go test -bench .
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For more detailed info about the Go track see the [help
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page](http://exercism.io/languages/go).
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## Source
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Inspired by the Bank OCR kata [http://codingdojo.org/cgi-bin/wiki.pl?KataBankOCR](http://codingdojo.org/cgi-bin/wiki.pl?KataBankOCR)
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## Submitting Incomplete Problems
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It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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