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Chapter 4

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Writing a Complete Program

Programming Logic and Design, Second Edition, Comprehensive

4

Chapter 4

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4

Objectives

After studying
Chapter 4, you should be able to:
Plan the mainline logic
for a complete program
Describe typical housekeeping
tasks
Describe tasks typically
performed in the main loop of a program
Describe tasks performed
in the end-of-job module

Chapter 4

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4

Understanding the Mainline  

Logical Flow Through a Program

Plan the Logic
Review : the output is
an inventory report

The report lists inventory
items along with the price, cost, and profit of each item

Write a program: 
reads from an input file and produces a printed report  KNOW AS  procedural
program      

Chapter 4

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Print Chart for Inventory Report

Chapter 4

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4

Understanding the Mainline  

Logical Flow Through a Program

Procedural Program , when
the program executes, each instruction takes place one at a time following
your programs logic.

Chapter 4

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4

Understanding the Mainline  

Logical Flow Through a Program

The overall or mainline
logic of
almost every procedural computer program can follow a general structure
that consists of three distinct parts:

Performing housekeeping,
or initialization tasks.