Input Process Output (IPO) and Structured/Hierarchy Charts

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Input Process Output (IPO) and
Structured/Hierarchy Charts

• Design Tools Part1

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Topics

• Input Process Output (IPO) Chart
• Hierarchy/Structured Chart
• Flow Chart
• Pseudo Code
• Source Code

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Design Steps and Tools
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Input -gt Process -gt Output (IPO)
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Input ? Process ? Output
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Input, Processing, and Output

• Three steps many programs perform
• Gather input data
• from keyboard
• from files on disk drives
• Process the input data
• Display the results as output
• send it to the screen
• write to a file

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Example1
Write a program that asks the user to enter a
temperature reading in centigrade and then prints
the equivalent fahrenheit value.
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Example2
Write a program that asks the user to enter
firstName and lastName and display a welcome
message to screen as Hello firstName lastName!
Welcome to HCCS
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Hierarchy/Structured Chart
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Hierarchy (Structured) Charts

• Depicts the logical functions to the solution of
  the problem using a chart
• Provides an overview that users and senior
  management can use to confirm the solution to the
  problem without excessive consideration to
  detail.
• High-level in nature

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Example1
Write a program that asks the user to enter a
temperature reading in centigrade and then prints
the equivalent fahrenheit value.
celsiusToFahrenheit (main function)
centigrade
fahrenheit
centigrade
fahrenheit
inputCent
calcFah
outputFah
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Write a program that asks the user to enter
firstName and lastName and display a welcome
message to screen as Hello firstName lastName,
Welcome to HCCS!
Example2
displayWelcomeMsg (main function)
firstName lastName
welcomeMsg
output WelcomeMsg
inputNames