Preliminary Software Engineering
Unit 1 - Programming Fundamentals
Unit 1 - Programming Fundamentals
  • 1 - Programming Fundamentals
    • Programming Fundamentals Content
  • 2 - Python
    • Expected Python Knowledge
    • GitHub
    • Learning Python
    • Data Structures and File Management
      • Data Structures
        • Lists
        • Arrays
          • Single and Multi-Dimensional Arrays
        • Lists vs Arrays
          • Activities
        • Tuples
        • Sets
        • Dictionaries
          • Activities
      • File Handling
        • Loops, Lists, Dictionaries
        • Activities
  • 3 - Theory Content
    • Theory Content Explained
      • NESA Directional Verbs
      • Responding to Directional Verbs
  • 4 - Software Development and Management
    • Approaches to Software Development
      • Waterfall Model
      • Agile Model
      • Summary: Waterfall vs Agile
      • Activities
    • Software Development Steps
      • Sample Exam Question
      • Requirements Definition
        • Understanding the Need
        • Key Questions to Ask
        • Examples
        • Activities
        • Sample Exam Question
      • Determining Specifications
        • Functional Specifications
        • Non-Functional Specifications
        • Activities
      • Design
        • Top-Down Design Approach
        • Bottom-Up Design Approach
      • Development
        • Optimising Code
      • Integration
        • Example: Payment Program
        • Activity
        • Application Programming Interface (API)
          • Example: OpenWeather API
          • Example: WeatherAPI
          • Activity: Prepare Spells
      • Testing and Debugging
        • Test Data
          • Activities
        • Testing the System
          • Activities
        • Debugging
          • Types of Errors
            • Activities
          • Python Debugger
            • Activities
          • VS Code Debugger
            • Activities
      • Installation
        • Activities
        • Sample Exam Question
      • Maintenance
  • Charts and Algorithms
    • Example: IPO Charts and Pseudocode
      • Activities
    • Algorithms, Flowcharts, Pseudocode
      • Pseudocode Activities
      • Flowchart Activities
      • Sample Exam Questions
    • Structure Charts
      • Activities
      • Sample Exam Questions
    • Data Flow Diagrams
      • Activities
    • Data Dictionaries
      • Activities
    • Decision Trees
      • Activities
      • Sample Exam Questions
    • Gantt Chart
    • Class Diagrams
      • Sample Exam Question
    • Storyboards
      • Sample Exam Question
  • Testing and Debugging
    • Test Data
      • Activities
    • Testing the System
      • Activities
    • Debugging
      • Types of Errors
        • Activities
      • Python Debugger
        • Activities
      • VS Code Debugger
        • Activities
  • Computational Thinking
    • Decomposition
    • Abstraction
    • Activities
  • Version Control
    • Git
    • GitHub
    • Activities
  • Number Systems
    • Binary Systems
    • Hexadecimal Numbers
    • Using Two's Complement
    • Activities
  • 5 - Assessment Task 1
    • Data Science Project
      • Before we Start
        • Setting up GitHub Repository
        • Setting Up Markdown Documentation
      • Examples of API Usage
        • Starter Code: NASA Scenario
        • Starter Code: Spell Book
        • Starter: Pokédex Explorer
        • Starter Code: Weather App
        • Example: OpenWeather API
        • Example: WeatherAPI
        • Example: Prepare Spells
    • Task Guide
      • Requirements Definition
      • Determining Specifications
        • Use Cases
      • Design
        • Gantt Chart
        • Structure Chart
        • Algorithms
        • Data Dictionary
      • Development
        • Comments vs DocStrings
        • UI - main.py
        • Create Python Module
          • Example: NASA Module
          • Example: WeatherFetch Module
          • Example: SpellBook Module
      • Integration
        • Example: Pokedex
      • Testing and Debugging
        • Commit Changes
      • Installation
      • Maintenance
    • Submitting Your Task
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On this page
  1. Testing and Debugging
  2. Debugging
  3. VS Code Debugger

Activities

  1. Copy the following into a new Python file:

discount.py
def calculate_total(price, quantity):
    total = price * quantity  # Line 3
    return total  # Line 4

def apply_discount(total, discount):
    return total - (total * discount)  # Line 6

def main():
    price = 100
    quantity = 5
    discount = 10  #
    total = calculate_total(price, quantity)  # Line 10
    total_after_discount = apply_discount(total)  # Line 11
    print(f"Total after discount: {total_after_discount}")  # Line 12

main()
  1. Set Up Debugging Mode

  • Open the Run and Debug panel (Ctrl + Shift + D).

  • Click "Run and Debug" and choose "Python File".

  1. Add Breakpoints

  • Click to the left of the line numbers to set breakpoints at:

    • Line 3 (where total is calculated)

    • Line 6 (where discount is applied)

    • Line 10 (when calculate_total is called)

    • Line 11 (when apply_discount is called)

  1. Run the Debugger

  • Press F5 to start debugging.

  • Use F10 to step over each line and inspect variables in the Variables panel.

  • Use the Debug Console to check variable values.

  1. Identify the mistakes, correct them, and rerun the program to verify your fix.

Submit when Finished

Submit a screenshot of your debug log to Google Classroom when you are finished.

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Last updated 3 months ago