vpl basic – data and variables young joon kim msrds first beginner course – step6
TRANSCRIPT
VPL basic – data and variables
Young Joon Kimhttp://www.helloapps.com
MSRDS First Beginner Course – STEP6
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Topics
• Procedure for VPL Programming
• Data and variable activities
• Defining variable
• Reading variable
• Displaying your name
• Input data
• Manipulate data with “Calculate”
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VPL
• Visual Programming Language
– Easy programming tool for novices and students
• Easy to start
• Easy to learn
• Easy to skill up
– Draw logics
– Provide intuitive and understandable flow
– Applicable for most S/W development area
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Procedure for VPL
programming
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Procedure for VPL programming
• Step1: Add activities or services
Add activities
Add services
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• Step2: Set values
Procedure for VPL programming
Set values
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• Step3: Connect each activity or service
Procedure for VPL programming
Connect
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• Step4: Connect functions
Procedure for VPL programming
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• Step5: Connect data for each item
Procedure for VPL programming
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Procedure for VPL programming
• Step6: Save and run a diagram
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Procedure for VPL programming
• Step7: Check the result
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Procedure for VPL programming
• Check log data
Log data
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Procedure for VPL programming
• Stop VPL running
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Data and variable activities
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Data and variable activities
• Data activity
– Define constant values
– Can’t be modified
• Variable activity
– Keep the values
– Can be modified
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Adding “Data” activity
• Double click “Data” activity or drag and drop
• Select data type
• Input data
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Double-click
Select data type
Input default value
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• Double click “Variable” activity or drag and drop
Adding “Variable” activity
Double-click
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Defining variable
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Defining variable
• Click “…” icon
Click icon
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• Add variable
• Change name
• Select variable type
Defining variable
Click
Change name Click
Select type
Click
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3
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• Assign value to the variable
Defining variable
Connect
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• Select “SetValue” item
Defining variable
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Defining variable
• Assigned value
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Reading variable
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Reading variable
• Use “Calculate” activity
Double-click
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Reading variable
• Connect “Variable” and “Calculate” activities
Connect
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Reading variable
• Select “state” item from the list
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Reading variable
• Add “.”
• Select “a” item from the list
Add “.”
Select “a”
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2
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Reading variable
• Add a “Simple Dialog” service
Double-click
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Reading variable
• Connect “Calculate” and “Simple Dialog” service
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Reading variable
• Select “AlertDialog” function
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Reading variable
• Select “value” item from the left list
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Reading variable
• Save and run diagram
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Reading variable
• Execution result
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Displaying your name
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Displaying your name
• Prepare below diagrams
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Displaying your name
• Connect “Data” and “Calculate” activities
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Displaying your name
• Type below text in the “Calculate” box
– “My name is “ + value
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Displaying your name
• Connect “Calculate” and “Simple Dialog”
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Displaying your name
• Select “AlertDialog”
• Select “value”
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Displaying your name
• Save and run diagram
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Displaying your name
• Execution result
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Input data
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Input data
• Add “Data” and set below text
– “Input your name: “
• Add a “HelloApps Console” service
Double-click
Double-click
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3
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Input data
• Connect “Data” and “Console”
• Select “Write”
• Select “value”
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Input data
• Copy and paste “HelloAppsConsole” service
• Connect first “Console” and second “Console” service
• Select “ReadLine” function
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1Copy firstConsole service
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• Copy and paste “HelloAppsConsole” service
• Connect second “Console” and third “Console” service
• Select “WriteLine” function
Input data
1Copy firstConsole service
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Input data
• Save and run diagram
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• Execution results
Input data
Type your name
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Manipulate data with
“Calculate”
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• Add “Calculate” activity
• Type “My name is “ +
Manipulate data with “Calculate”
1Add “Calculate”
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Manipulate data with “Calculate”
• Select “Value” from the list
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Manipulate data with “Calculate”
• Connect “Calculate” and “Console”
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Manipulate data with “Calculate”
• Select “WriteLine” function
• Select “value” data
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Manipulate data with “Calculate”
• Save and run diagram
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Manipulate data with “Calculate”
• Execution results
Type your name