Research on the Copy Detection Algorithm for Source Code Based on Program Organizational Structure Tree Matching

Code plagiarism is an ubiquitous phenomenon in the teaching of Programming Language. A large number of source code can be automatically detected and uses the similarity value to determine whether the copy is present. It can greatly improve the efficiency of teachers and promote teaching quality. A algorithm is provided that firstly match program organizational structure tree and then process the methods of program to calculate the similarity value. It not only applies to process-oriented programming languages but also applies to object-oriented programming language.