Chapter 3 Flashcards
Snarled, unstructured program logic
Spaghetti code
Programs that do not follow the rules of structured logic.
Unstructured program
Program that do follow the rules of structured logic.
Structured programs
a basic unit of programming logic; each structure is a sequence, selection, or loop.
Structure
This contains a series of steps,executed in order. this can contain a number of tasks, but there is no option to branch off and skip any of the tasks.
Sequence Structure
Contains a question, and depending on the answer, takes one of the two courses of action before continuing with the next task.
Selection or Decision Sturcture
Designates the end of a pseudocode structure
End Structure Statement
Another name for selection/decision statement.
If-then-else
Define one action to be taken when the tested condition is true and another action to be taken when it is false.
Dual-Alternative selections (Defenitive Ifs)
Take action on just one branch of the decision.
Single-Alternative selections (Single Ifs)
The branch of a decision in which no action is taken.
Null Case
Continues to repeat actions while a test condition remains true.
Loop Structure
The set of actions that occur within a loop.
Loop Body
Another name for a loop structure.
Repetition (Iteration)
A process continues while some conditions continues to be true.
While do (While Loop)
The act of attaching structures end to end.
Stacking Sturctures
The act of placing a structure within another structure.
Nesting Structures
A Group of statements that executes as a single unit.
Block
The statement that reads the first input data record prior to starting a structured loop.
Priming Input (Priming Read)
What do programmers promote by using structured programs?
Clarity, Professionalism, Efficiency, and Modularity.
A Sequence, Selection, and Loop.
What are the types of structures in a program?
- Programs only consist of three basic structures; a sequence, loop, and/or a selection. A structure may contain one, two, or all of these structures.
- Each structure has to have only one entrance and one exit point.
3 . Structures can only be stacked or connected to one another only at their entry or exit point.
- Any structure can be nested within another structure.
What are the rules to having a structured program?
