Question

Compare and contrast between flowcharts that involve:

• simple logic flow and

• simple logic flow with a two way branch.

Answer 1

Use a Logic Flowchart to:

• represent the logic of a process which involves intermingling the evaluation of conditions with the execution of several actions,
• uncover loopholes in logic which can impose problems
• We see what is actually happening in a logic and what should be happening to uncover problems

Method

LOGIC FLOWCHART SYMBOLS

The following symbols are used on a Logic Flowchart:

· Flow of Control — A symbol used to control the movement between the symbols.

· Termination — start and finish of flowchart is told by this symbol.

· Process Box — Occurence of any process or action is measured by this symbol.

· Decision Diamond — A symbol used to differentiate between two different affairs on which decision is to be taken.There are only two possible exits to a decision diamond, TRUE and FALSE.

Rules for Constructing a Logic Flowchart

Advantages and Disadvantages of Logic Flowcharts

CONVENTIONAL FLOWCHART SYMBOLS

The following conventional flowchart symbols are from the IBM flowchart template:

· Communication Link — for transfering data in and out of the scope of the system.

· Data Preparation — Represents a written input medium.

· Decision — Represents some logical decision point that controls processing flow.

· Disk Storage — Represents some magnetic media device that exists for read/write purposes.

· Display — Represents a Cathode Ray Terminal/Liquid Crystal Display (CRT/LCD) output medium.

· Document — paper-based output is represented.

· Extract — Represents a logical database (or flatfile) data retrieval operation that results in a set of buffered data.

· Input/Output — data flow directions are told during input output operations.

· Keying — Represents a keyboard data entry activity.

· Magnetic Tape — Represents some magnetic tape data storage media.

· Manual Operation — Action of a user is represented.

· Merge — Two data sets merging is represented.

· Off-page connector — Diagram component is connected on the current and the another page.

· Office Storage — Represents paper files.

· On-page connector — Two Diagram components on the same page are connected by this.

· Pre-defined Process — Represents a unit of logic that has already been coded.

· Process — Represents some set of logic that has defined inputs and outputs.

· Sort — Represents a logical sort routine that is applied to some output data set.

.....................................................................

Hope this may help you...Have a nice day ahead......