Skip to main content

Structured English

 

Structured English in System Analysis and Design

Structured English is a technique used in system analysis and design to describe the logic of a system's processes in a clear and concise way. It combines the readability of natural language with the precision of programming constructs.

Here's a breakdown of its role:

  • Purpose: Clearly document the steps involved in a system's functionalities.
  • Benefits:
    • Improves communication between analysts, designers, and users by using familiar language with a structured approach.
    • Enhances the clarity and maintainability of system design documents.
    • Aids in identifying potential flaws in the logic before coding begins.
  • Structure:
    • Uses a limited set of English verbs like "display," "calculate," "update," etc.
    • Incorporates control flow keywords like "IF," "WHILE," "FOR EACH" for decision-making and loops.
    • Avoids unnecessary adjectives and adverbs for better focus.

Relationship to Structured Analysis and Design (SA/SD):

Structured English is one of the tools used within the SA/SD methodology. SA/SD is a systematic approach for developing software systems. Here's how they work together:

  1. Structured Analysis: Analyzes the existing system (if applicable) and defines the requirements for the new system. This might involve Data Flow Diagrams (DFDs) to map data flow and functionalities.
  2. Structured Design: Uses the analysis results to design the new system's architecture. Structured English comes into play here to describe the logic within each process or function identified in the DFDs.
  3. Coding: The structured English descriptions are then translated into actual programming code.

Overall, Structured English helps bridge the gap between the high-level requirements of a system and the detailed code that implements it.

Comments

Post a Comment

Popular posts from this blog

C++ Functions

C++ Functions A function is a block of code that performs a specific task. Suppose we need to create a program to create a circle and color it. We can create two functions to solve this problem: a function to draw the circle a function to color the circle Dividing a complex problem into smaller chunks makes our program easy to understand and reusable. There are two types of function: Standard Library Functions:  Predefined in C++ User-defined Function:  Created by users In this tutorial, we will focus mostly on user-defined functions. C++ User-defined Function C++ allows the programmer to define their own function. A user-defined function groups code to perform a specific task and that group of code is given a name (identifier). When the function is invoked from any part of the program, it all executes the codes defined in the body of the function. C++ Function Declaration The syntax to declare a function is: returnType functionName (parameter1, parameter2,...) { // func...
Post a Comment
Read more

C++ Variable

C++ Variables: Named Storage Units In C++, variables serve as named boxes in memory that hold values during program execution. Each variable has three key aspects: 1. Data Type: Defines the kind of data a variable can store: numbers (integers, floating-point, etc.), characters, boolean values (true/false), or custom data structures (arrays, objects). Common data types: int : Whole numbers (e.g., -10, 0, 23) float : Decimal numbers (e.g., 3.14, -2.5) double : More precise decimal numbers char : Single characters (e.g., 'a', 'Z', '&') bool : True or false values 2. Name: A user-defined label for the variable, chosen according to naming conventions: Start with a letter or underscore. Contain letters, digits, and underscores. Case-sensitive (e.g.,  age  and  Age  are different). Not a reserved keyword (e.g.,  int ,  for ). Choose meaningful names that reflect the variable's purpose. 3. Value: The actual data stored in the variable, which must match its data...
Post a Comment
Read more

Understanding Multidimensional Arrays:

  Understanding Multidimensional Arrays: Think of a multidimensional array as a collection of smaller arrays nested within each other, forming a grid-like structure. Each element in the grid is accessed using multiple indices, one for each dimension. Declaration and Initialization: C++ data_type array_name[dimension1][dimension2][...][dimensionN]; // Example: 3D array to store temperatures (city, month, day) int temperatures[ 3 ][ 12 ][ 31 ]; // Initialization in one line double prices[ 2 ][ 3 ] = {{ 1.99 , 2.50 , 3.75 }, { 4.20 , 5.99 , 6.45 }}; Use code  with caution. content_copy Accessing Elements: Use multiple indices within square brackets, separated by commas: C++ int first_temp = temperatures[ 0 ][ 5 ][ 10 ]; // Access temperature of city 0, month 5, day 10 prices[ 1 ][ 2 ] = 7.00 ; // Update price in row 2, column 3 Use code  with caution. content_copy Important Points: Dimensions:  The total number of elements is calculated by multiplying the dimen...
Post a Comment
Read more