AST-Based Multi-Language Plagiarism Detection Method

To detect plagiarism on programming course,AST-based plagiarism detection method is proposed.First,parsing the code generated the corresponding Abstract Syntax Tree(AST).Biology sequence matching algorithms are used to calculate the similarity of the program.Find the similar part of the code,and then extract the AST feature in this part.Generated vector space model,and then find "copycluster" by clustered the feature.Experiments show that this method has a good effect on the detection of plagiarism and can find the "copy cluster" accurate.