1 / 20

Problem Solving Cycle in Visual Basic Programming

Learn about the program development cycle in Visual Basic programming, including analysis, design, coding, debugging, and documentation.

Download Presentation

Problem Solving Cycle in Visual Basic Programming

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Chapter 2 Problem Solving Chapter 2- Visual Basic Schneider

  2. Outline and Objective Program Development Cycle Programming Tools Chapter 2- Visual Basic Schneider

  3. Programming Languages: • Machine Language • Assembly Language • High level Language Chapter 2- Visual Basic Schneider

  4. Machine Language • The fundamental language of the computer’s processor, also called Low Level Language. • All programs are converted into machine language before they can be executed. • Consists of combination of 0’s and 1’s that represent high and low electrical voltage. Chapter 2- Visual Basic Schneider

  5. Assembly Language • A low level language that is similar to machine language. • Uses symbolic operation code to represent the machine operation code. Chapter 2- Visual Basic Schneider

  6. High Level Language • Computer (programming) languages that are easier to learn. • Uses English like statements. • Examples are C ++, Visual Basic, Pascal, Fortran and ….... Chapter 2- Visual Basic Schneider

  7. Program Development Cycle: 1. Analyze: Define the problem 2. Design: Plan the solution to the problem 3. Choose the Interface: Select the objects Chapter 2- Visual Basic Schneider

  8. Program Development Cycle: 4. Code: Translate the algorithm into a programming language. 5. Debug and Test: Locate and remove any errors in the program. 6. Complete the Documentation: Organize all the materials that describe the program. Chapter 2- Visual Basic Schneider

  9. Programming Tools: • Flowchart • Algorithms • Pseudocode • Hierarchy Chart (Structure chart) Chapter 2- Visual Basic Schneider

  10. What is a flowchart? • Logic diagram to describe each step that the program must perform to arrive at the solution. • A popular logic tool used for showing an algorithm in graphics form. Chapter 2- Visual Basic Schneider

  11. Continue flowchart • Programmer prepares flowchart before coding. • Most common flowchart symbols are: Chapter 2- Visual Basic Schneider

  12. Purpose of Flowcharting: • An aid in developing the logic of a program. • Verification that all possible conditions have been considered in a program. • Provides means of communication with others about the program. • A guide in coding the program. • Documentation for the program. Chapter 2- Visual Basic Schneider

  13. Example of Flowchart: Start Initialize Counter =1 and sum to 0 Are there more data No Yes Get next grade Increment counter Add grade to sum Chapter 2- Visual Basic Schneider

  14. Desk Checking • The process of testing the flowchart with different data as input, and checking the output. • The test data should include nonstandard data as well as typical data. Chapter 2- Visual Basic Schneider

  15. ALGORITHMS • Used to develop the step by step instructions for a computer program or Object event. • Algorithms are used to develop the logic of a program or Object event. • Also aids in identifying variables needed in a program or event. Chapter 2- Visual Basic Schneider

  16. Example Algorithm EXAMPLE HERE Chapter 2- Visual Basic Schneider

  17. What is a Pseudocode? • A program design technique that uses English words. • Has no formal syntactical rules. Chapter 2- Visual Basic Schneider

  18. Example of Pseudocode: • Determine the average grade of a class: Do while there are more data Get the next Grade Add the Grade to the Sum Increment the Counter Loop Compute average = Sum / Counter Display average Chapter 2- Visual Basic Schneider

  19. What is a Hierarchy Chart? • Shows the overall program’s structure. • Describes what each part, or module, of the program does. • Also how each module relates to other modules in the program. Chapter 2- Visual Basic Schneider

  20. Example of Hierarchy Chart: Class average Program Get Grade Compute Sum Calculate Average Display Average Chapter 2- Visual Basic Schneider

More Related