EE 222 Course 4 part 1

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EE 222 Course 4 - part 1

• Announcements
• Homeworks 1 and 2 were due Tuesday MIDNIGHT
• Next week classes (T and TH) Pr. P Mlesna
• You will work on a 1-week project
• get/print all course material from Vista
• IF it does not work I will send an email to every
  one and let you know where to get the material
  from
• homework word (.doc) or pdf file
• Thanks!

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EE 222 Course 4 - part 1

• Ever notice that 'what the hell' is always the
  right decision?
• Marilyn Monroe

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EE 222 Course 4 - part 1

• Todays Menu
• Making decision flow control
• Conditional statements
• if, if-else statements
• switch
• Loops
• while, do-while, for loops
• Controlling loops with continue and break

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EE 222 Course 4

• Objectives
• Write proper flow charts
• is it a while or a do-while?
• Handle properly, master the use of
• repetition structures
• Selection structures

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EE 222 Course 4

• NOTE!!!!!!
• In the following
• boolean expression test condition whose result
  is
• true or false 0 or 1 (_____ 1 and
  _____ 0)
• Statement
• a single instruction ENDED by or
• a set of instructions all ENDED by

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Conditional statement if

• Syntax
• if (boolean expression)
• statement
• What it does
• Executes a statement/ block of code if and only
  if some boolean expression is true.
• Note indent the statement in the
• Flow chart look

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Conditional statement if -flow chart
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Conditional statement if -example
include using namespace std int
main() // Let's define the number that we
want the // player to guess as a constant
const int magicNumber 8 // Ask the player
for his guess cout between 1 and 10 " about..."
playerGuess // Give some feedback if the
guess is right if( playerGuess magicNumber
) cout right!" too smart for me!" done! return 0
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Conditional statement if-else

• Syntax
• if (boolean expression)
• statement
• else
• statement
• What it does
• Executes a statement/ block of code if and only
  if some boolean expression is true AND .
• Gives a 2nd alternative
• It is more user-friendly you know whats going
  on
• Flow chart look

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Conditional statement if-else flow chart
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Conditional statement if-else -example
if( playerGuess magicNumber ) cout
cout 12
Conditional statements combination

• Chained if-else statements
• Nested conditional statements

if(boolean condition) statement else
if(boolean condition) statement else
if(boolean condition) statement
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Conditional statements (contd)Nested
conditional statements

• if( boolean condition )
• statement
• if(boolean condition)
• statement
• else if(boolean condition)
• statement
• else
• statement

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Conditional statement switch statement

• Syntax
• switch (expression)
• case expression_value1 statement
• case expression_value2 statement
• .
• case expression_valuen statement
• default statement
• NOTE expression can _____ be bool, int, char
• What it does
• Executes a statement/ block of code if and only
  if one expression value is true
• Its equivalent to several _____ statements but
  its more neat

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Conditional statement switch statement
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Conditional statement switch statement example

• include
• using namespace std
• int main()
• // Let's read the grade
• cout
• char theGrade
• cin theGrade
• // Give an appropriate assessment
• switch( theGrade )
• case 'A'
• cout
• case 'B'
• case 'C'
• case 'D'

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Conditional statement switch statement example
(contd)

• Caution
• If you forget a _____ in a switch statement, the
  computer may execute the _____ case statement.

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Loop the while loop

• Syntax
• while(boolean expression/ test condition)
• statement
• What it does
• Executes a statement/ block of code as long as
  the test condition holds true.
• Flow chart look

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Loop the while loop -flow chart
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Loop the while loop example

• include
• using namespace std
• int main()
• // Let's define the number that we want the
• // player to guess as a constant
• const int magicNumber 8
• // Let's initialize the player's guess with a
• // bogus value that is not the right choice
• int playerGuess -1
• // Then, ask the player to guess until he
• // gets it right
• cout

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Loop the while loop contd

• Notes
• If the test condition
• Is _____ right from the start the block will not
  be executed even _____.
• Is always true then its an _____ loop the
  computer has no way to stop repeating the block

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Loop the do-while loop

• Syntax
• do
• statement
• while(boolean expression/ test condition)
• What it does
• Executes a statement/ block of code at least
  _____as long as the test condition holds true.
• Flow chart look

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Loop the do-while loop - flow chart
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Loop the do-while loop - example

• do
• cin playerGuess
• if( magicNumber playerGuess )
• cout
• else
• cout
• while( magicNumber ! playerGuess )

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Loop the for loop

• Syntax
• for (initialisation of control variable
  test condition control variable update
  )
• statement
• What it does
• Combines __________, _____ and _____
• Executes a statement/ block of code as long as
  the test condition holds true.
• Flow chart look

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Loop the for loop - flow chart
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Loop the for loop -example
//single initialization for(index1
index playerGuess
if( magicNumber playerGuess ) cout "You're right! Congratulations!\n" else
cout initialization for(index1,ca indexindex,c) cin playerGuess if(
magicNumber playerGuess ) cout "You're right! Congratulations!\n" else
cout

You can rewrite a _____ loop as a _____ loop

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Combination loop, conditional statement
do // Ask the player for his guess
cin playerGuess // Give feedback
if( magicNumber playerGuess ) cout "You're right! Congratulations!\n" else
cout magicNumber ! playerGuess )
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Questions

• It helps me when
• It would help me if
• The question I have is

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Course Lab part 2

• Understand the problem
• organize /summarize the results of a problem
  analysis IPO chart
• Output ?
• Input ?
• Algorithm input processing?
• Flow chart
• And THEN .Programming

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Your Turn

• It helps me when
• It would help me if
• The question I have is