Upgrade to Pro — share decks privately, control downloads, hide ads and more …

CSC309 Lecture 01

CSC309 Lecture 01

Software Engineering II
Course Presentation
(202301)

Javier Gonzalez-Sanchez

January 09, 2023
Tweet

More Decks by Javier Gonzalez-Sanchez

Other Decks in Programming

Transcript

  1. jgs CSC 309 Software Engineering II Lecture 01: Course Presentation

    Dr. Javier Gonzalez-Sanchez [email protected] www.javiergs.com Building 14 -227 Office Hours: By appointment
  2. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    4 Dr. Javier Gonzalez-Sanchez [email protected] www.javiergs.com javiergs @mscjaviergs @mscjaviergs Contact Information
  3. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    5 www.javiergs.com/teaching/ At CSU: * Software Engineering (CSC 307, 308, 309, 509) * Applied Affective Computing (CSC 570) Teaching
  4. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    7 Office Hours Tuesday and Thursday 3 - 5 pm But an appointment required Sent me an email – [email protected]
  5. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    13 Course Content This is NOT a web development course. That one is CSC 437
  6. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    15 1. Programming in the Large vs Programming in the Small 2. Code is meant for human consumption and it’s meant for computer consumption. 3. Assigning Responsibility - together but not scrambled Key Ideas CSC 308
  7. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    16 1. Implementation, integration, and maintenance of large software systems – reuse, modifiability, and extensibility. 2. Software quality - verification, validation, testing 3. Technical presentation Key Ideas CSC 309
  8. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    18 Key Idea 2: SVVT idea requirements architecture design code unit testing integration testing system testing operation validation validation verification verification quality measure
  9. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    20 Grading Team Project 30% 20% Assignments 20% Labs + Quizzes 20% Final Exam 5% Attendance & Participation 5% Self / Peer Evaluation 100%
  10. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    21 Grading 100% A >= 96.5 A- >= 93.0 B+ >= 89.5 B >= 86.0 B- >= 82.5 C+ >= 79 C >= 75.5 C- >= 72.0 D+ >= 68.5 D >= 65.0 D- >= 61.5 F < 61.5
  11. jgs

  12. jgs CSC 309 Software Engineering II Lecture 02: Software Metrics:

    Code Quality Dr. Javier Gonzalez-Sanchez [email protected] www.javiergs.com Building 14 -227 Office Hours: By appointment
  13. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    26 Key Ideas CSC 309 idea requirements architecture design code quality measure
  14. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    27 code Key Ideas CSC 309 idea requirements architecture design quality measure
  15. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    28 Metrics Size LOC eLOC lLOC Understandability Comments Whitespaces Complexity Average, Max, Min LOC Interface Complexity Cyclomatic Complexity Software Metrics
  16. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    29 § Knowing what is inside your source code is the first step in assessing the quality of the software product. § Knowing the quantity of work performed in generating the source code is the first step in determining the productivity of your software team. Software Metrics
  17. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    31 § LOC – Lines of Code Metric. Including lines of a single brace or parenthesis § LOC are used to create time and cost estimates. § LOC are a tracking tool to measure the degree of progress on a module or project. § An experienced developer can gage a LOC estimate based upon knowledge of past productivity on projects. Size Metrics
  18. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    32 § eLOC – effective Lines of Code Metric. Only code statements § An effective line of code or eLOC is the measurement of all lines that are not comments, blanks or standalone braces or parenthesis. These can inflate LOC metrics by 20 to 40 percent. § This metric more closely represents the quantity of work performed. Size Metrics
  19. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    33 § lLOC – logical Lines of Code Metric. § These statements are terminated with a semi-colon. § The control line for the "for" loop contain two semi-colons but accounts for only one semi colon. Size Metrics
  20. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    36 § Comment Line and Comment Percent Metric § The degree of commenting within the source code measures the care taken by the programmer to make the source code and algorithms understandable. § Poorly commented code makes the maintenance phase of the software life cycle an extremely expensive adventure. § Comments can occur by themselves on a physical line or be co-mingled with source code. The sum of the lines of code, comments and blank lines often exceeds the physical line count. This is expected a when comments are co-mingled with source code. § Comment Percent = Comment Line Count / (LOC) x 100 Understandability Metrics
  21. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    37 § Blank Line and White Space Percent Metric § The number of blank lines within source code determines the readability of the product. White space accents the logical grouping of constructs and variables. Programs which use few blank lines are difficult to read and more expensive to maintain. § It counts the spaces and characters within the source code. The white space percentage metric is another measure of readability for the source product. § White Space Percentage = (Number of spaces / Number of spaces and characters) * 100 Understandability Metrics
  22. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    38 § Average LOC per Function Metric. An accepted industry standard of 200 LOC per function is desired as the average LOC per function § Maximum LOC per Function Metric. § Minimum LOC per Function Metric. A minimum LOC per function of 2 or less can indicate functions that may have been prototype but not yet complete.. Function Metrics
  23. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    40 § Cyclomatic Complexity. It is a quantitative measure of the number of linearly independent paths. § Paths occur when "while,” "for,” "if,” "case," and "goto" keywords appear within the function. § If the source code contained no control flow statements (conditionals or decision points), the complexity would be 1 § If the code had one single-condition IF statement, there would be two paths through the code: one where the IF statement evaluates to TRUE and another one where it considers to be FALSE. § Two nested single-condition IFs, or one block with two conditions, would produce a complexity of 3. Function Metrics
  24. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    41 Cyclomatic Complexity CC = Edge - Node + 2 Or CC = ConditionalNodes + 1
  25. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    42 i = 0; n=4; while (i<n-1) { j = i + 1; while (j<n) { if (A[i]<A[j]) swap(A[i], A[j]); } i=i+1; } // CC = 9 - 7 + 2 = 4 // CC = 3 + 1 = 4 (Condition nodes are 1,2 and 3 nodes) // A set of possible execution path of a program // 1, 7 // 1, 2, 6, 1, 7 // 1, 2, 3, 4, 5, 2, 6, 1, 7 // 1, 2, 3, 5, 2, 6, 1, 7 Cyclomatic Complexity
  26. jgs Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 |

    43 Complexity Number Meaning 1-10 Structured and well written code High Testability Cost and Effort is less 10-20 Complex Code Medium Testability Cost and effort is Medium 20-40 Very complex Code Low Testability Cost and Effort are high >40 Not at all testable Very high Cost and Effort Cyclomatic Complexity
  27. jgs CSC 309 Software Engineering II Javier Gonzalez-Sanchez, Ph.D. [email protected]

    Winter 2023 Copyright. These slides can only be used as study material for the class CSC308 at Cal Poly. They cannot be distributed or used for another purpose.