How do I compare two paragraphs that may of different lenghts.

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I am working on a typing tutor software. GUI is complete. I am having problem in comparing the text typed by user with the original text. I am not able to think of an algorithm for this. There are variety of cases, like Misspelt words, missed/skipped words, skipped sentences etc.
How do I proceed for comparison. Also. Please do I need to capture Unicode ? I am working in ASP.net (VB).

I have tokenized both the texts, original and user's text. Now specifically, my problem is how to compare both. In user's text some words may be missing, or there may be some extra words (not found in original text). So i am stuck at : how do I compare both.

Kindly help. Thanks.

What I have tried:

Honestly, not tried anything yet. having problem to find an algorithm about this.

Posted 28-May-23 1:41am

soodsandeep

Updated 28-May-23 2:02am

Richard MacCutchan

v2

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Ralf Meier 28-May-23 15:27pm

It could be useful if you give some samples of both texts ... how are they looking like ...?

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Graeme_Grant · Answer 1 · 2023-05-28T01:48:00

Solution 1

THis should help: vb diff algorithm - Google Search[^] .. there are several results that could meet your requirements.

Posted 28-May-23 1:48am

Graeme_Grant

Patrice T · Answer 2 · 2023-05-28T02:02:00

Solution 2

Quote:
Honestly, not tried anything yet. having problem to find an algorithm about this.

Are you looking for something like this ?
Longest common substring - Wikipedia[^]

Posted 28-May-23 2:02am

Patrice T