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1 C3PV 1,a) 2,b) 2,c) 3,d) 1,e) , C3PV C3PV C3PV 1 Java C3PV % Programming Process Visualization for Supporting Students in Programming Exercise Hiroshi Igaki 1,a) Shun Saito 2,b) Akifumi Inoue 2,c) Ryota Nakamura 3,d) Shinji Kusumoto 1,e) Received: April 20, 2012, Accepted: October 10, 2012 Abstract: In this paper, we propose a coding process visualizer for programming practice. Our system named C3PV consists of an online editor and a coding process viewer. The online editor can collect all coding process performed by each student. The coding process viewer can visualize whether the students are doing well about their programming exercises. This viewer enables a lecturer and teaching assistants to identify the students who are falling behind the rest of the class. We confirmed that the system could determine whether the student needed our help with 84 percent accuracy by some practical experiments. Keywords: programming exercise, coding, progress management, software engineering education 1 Graduate School of Information Science and Technology, Osaka University, Suita, Osaka , Japan 2 School of Computre Science, Tokyo University of Technology, Hachioji, Tokyo , Japan 3 Katayanagi Institute, Tokyo University of Technology, Hachioji, Tokyo , Japan a) b) c) d) e) 1. [2] c 2013 Information Processing Society of Japan 330

2 [5] [11] TA Teaching Assistant [4], [10], [12] C3PV Coding Process Visualizer in Programming Practice C3PV LOC Lines Of Code 4 C3PV TA [9] TA R1 R2 R3 LOC 3. C3PV 3.1 c 2013 Information Processing Society of Japan 331

3 1 Table 1 Categories of C3PV s editor area log. inserttext removetext insertlines removelines Table 2 Examples of editor area log. 1 C3PV Fig. 1 Coding process visualizer in programming practice (C3PV). ID : int x = 4; insertlines int y = 3; : removetext : inserttext : int x = 4; removelines int y = 5; 2 Java Fig. 2 Coding example of Java with C3PV s online editor. C3PV 1 C3PV C3PV PC C3PV C3PV Save CompileRun Compile Run Ace [1] C3PV 1 1 C3PV C3PV 1 & &C3PV / 2 C3PV ID ID int x y 2 insertlines y 3 5 removetext inserttext 2 removelines C3PV 3 autosave C3PV newopen open close 1 c 2013 Information Processing Society of Japan 332

4 close 4 C3PV hello, world! Java ID syuns newopen C3PV autosave syuns [Compile] compile [Run] run syuns [Save] save [ ] submit close 3.3 C3PV 4 M1 LOC M2 M3 M4 3 Table 3 Categories of C3PV s controller area log. newopen open newopen save [Save] autosave C3PV close compile [Compile] run [Run] submit [ ] M1 LOC LOC LOC LOC 1 M2 newopen open submit M2 M3 / & M3 (1) (4) 4 (1) a (2) a (3) class (4) class 4 Table 4 Examples of controller area log. ID ID 1 syuns newopen :30:00 Java 2 syuns autosave :31:00 Java 3:...world! ) 3 syuns compile :31:05 Java 3:...world! ) 3: ; expected 4 syuns run :31:20 Java 3:...world! ); hello, world! 5 syuns save :31:25 Java 3:...world! ); 6 syuns submit :31:30 Java 3:...world! ); 7 syuns close :31:35 Java 3:...world! ); c 2013 Information Processing Society of Japan 333

5 M4 / / M4 3.4 C3PV M1 M4 3 3(a) ID LOC 3(b) 3(c) (d) 4 (a) ID 4(b) 4 M1 M4 ID X11105D M1 M2 2 2 LOC 2 2 M1 M Fig. 3 Example of metrics ranking view C3PV (a) M1 M4 (b) M1 M4 4 Fig. 4 Visualization example of sheetmap view. c 2013 Information Processing Society of Japan 334

6 edubasecloud [7] edubasecloud Xeon 2.4 GHz CPU 8 24 GB OS CentOS5.6 DBMS Apache/2.2.3 MySQL/ PHP/5.3.3 ZendFramework/ JavaScript jquery/1.7.0 Ace/0.2.0 edubasecloud IaaS IaaS OS CPU edubasecloud C3PV OS CPU OS C3PV 4.2 Ideone Ideone.com [3] API Ideone 40 SOAP 4.3 C3PV C3PV ID C3PV 3 C3PV C3PV C3PV 3 C3PV C3PV newopen open close 1 autosave compile run C3PV Ideone.com compile run API API compile run compile run submit C3PV C3PV 1 1 C3PV ID C3PV 5 II 1 Java A B TA 4 5 Table 5 Experimental environment. 1 2 II Java A B /TA 1/3 1/ c 2013 Information Processing Society of Japan 335

7 M1 M4 1 TA TA ID C3PV /TA C3PV 6 /TA Table 6 Total number of directed students C3PV 1 31 C3PV % 2 35 C3PV % C3PV C3PV Table 7 Result of enquete c 2013 Information Processing Society of Japan 336

8 eclipse undo 2 2 DL 2 2 C3PV C3PV Web Web C3PV C3PV C3PV C3PV C3PV 1 C3PV 2.2 R1 R3 3 A1 C3PV ID A2 M1 M4 A3 M1 M4 C3PV C3PV 2 Save/Compile/Run C3PV undo c 2013 Information Processing Society of Japan 337

9 UI Web C3PV C3PV CAPES [4] CAPES [6] [10] C Java [8] C3PV [12] TA C3PV C3PV 7. C3PV Java Ideone M1 M4 C3PV C3PV C3PV C3PV C3PV C3PV C3PV B [1] Ajax.org Cloud9 Editor: Ace, available from [2] IT 2011 (2011). [3] Sphere Research Labs: Ideone.com, available from [4] c 2013 Information Processing Society of Japan 338

10 Vol.J91-D, No.2, pp (2008). [5] Vol.53, No.1, pp (2012). [6] Vol.48, No.2, pp (2007). [7] edubase Cloud, [8] PEN Vol.48, No.8, pp (2007). [9] Vol.26, No.1, pp.5 15 (2009). [10] collaboration agent / ET Vol.104, No.703, pp (2005). [11] CE Vol.2012-CE-113, No.6, pp.1 8 (2012). [12] 18 pp.1 6 (2007) IEEE ACM IEICE ACM DICOMO2005 & GNWS2011 ACM IEEE IFPUG 2011 c 2013 Information Processing Society of Japan 339

TA(Teaching Assintant) [1] [] [3] C3PV(Coding Process Visualizer in Programming Practice) C3PV LOC(Lines Of Code) 4 C3PV TA C3PV C3PV /TA /TA 45 84% C

TA(Teaching Assintant) [1] [] [3] C3PV(Coding Process Visualizer in Programming Practice) C3PV LOC(Lines Of Code) 4 C3PV TA C3PV C3PV /TA /TA 45 84% C THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS TECHNICAL REPORT OF IEICE. 19-98 144-1 19-98 144-1 56-8531 1-3 C3PV C3PV C3PV 1 Java Programming Process Visualization for Supporting

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