CSC115 Introduction to Computer Programming

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CSC115 Introduction to Computer Programming

• Zhen Jiang
• Dept. of Computer Science
• West Chester University
• West Chester, PA 19383
• zjiang_at_wcupa.edu

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Table of Contents

• Structure
• Loop
• Function
• Interesting features
• Graphics
• Other tools

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Loop

• Basic Idea (sequence diagram)

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Loop

• Do Loop
• Do while Loop
• do while condition
• statements1
• loop
• statements2

5
No
Yes
condition
Statements1
Statements2
6

• Counter Control Loop
• Repetition body
• Condition
• Increment and initialization

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• Exercises
• Example 1, page 165

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• How to get a result of a loop program by hand
• Counter control loop see a counter
  (initialization, increment, condition)
• Repeat the body that many times
• For each statement, check the change of variable
  value.

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• How to develop your own loop program
• Counter control loop know what is the body
  process and how many times it repeats.
• Following the format of counter control loop,
  write down these in such an order condition,
  increment, initialization.
• Find the change of body for each time it repeats,
  compare it with the change of counter, determine
  the relationship of them, form the statements of
  body.

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• Event Control Loop
• Repetition body
• Event condition
• Initialization

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• Exercises
• Exercises 25 (with 25 students), 23, 25, page 176

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• How to get a result of an event control loop
  program by hand
• check condition
• If needs another round, repeat the body and check
  the change of variable value for each statement.
  Otherwise, stop.
• check condition
• If needs another round, repeat the body and check
  the change of variable value for each statement.
  Otherwise, stop.
• check condition and stop because the event occurs

13

• How to develop your own loop program (Simple
  version)
• Event control loop not counter control loop
• EOF

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• How to develop your own loop program
• Event control loop not counter control loop
• Write down the condition to describe when the
  event occurs.
• Write down the process body.
• Write down the initialization and check the
  change in the process body to ensure the event
  will occur finally and make the condition false.

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• Do Until Loop
• Do
• statements1
• Until condition
• statements2

16
Statements1
No
Yes
condition
Statements2
17

• For loops

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• Exercises
• Exercises 18, 21, 22, page 185
• Exercises 33, page 187
• Exercises 36, page 188