• Announce
  • Random Quiz #3
  • Assignment #2

• Balloon Example (need for labs)
  use figures from book (pp. 99-104)
  fly.out
  actual program:
  fly.cc

• Member Functions
  methods
  actions
  .Ascend()
.Cruise()
.Descend()

• Information Hiding

• Header Files

• Interface Diagram

• Reading the Header File (p. 103)
  • Public
  • Private
  • Private Variables: State
  balloon.h

• Compiling and Linking

Chapt 4. Building Programs & Solving Problems

• if Statement
  
  if ( test expression )
{
statement list;
}

• if/else Statement
  
  if ( test expression )
{
statement list;
}
else
{
statement list;
}

• if/else Examples:
  • sort3.cc
  • smallof3.cc
  • firstof3.cc

• Relational Operators

  ==	equal to
  >	greater than
  <	less than
  !=	not equal to
  >=	greater than or equal to
  <=	less than or equal to

• Value of Relational Operations
  true = 1
  false = 0

• Logical Operators
  • OR ||
  • AND &&
  • NOT !

• Short Circuit Evaluation exhaust4.cc

• C++ Operator Precedence

  !	NOT
  *, /, %	mult, div, mod
  +, -	add, subt
  <<, >>	insert, extract
  <, <=, >, >=	LT, LE, GT, GE
  ==, !=	EQ, NE
  &&	AND
  ||	OR
  =, +=, -=, *=, /=, %=	assignment

  When in doubt, parenthesize

• Functions that Return Values math.cc

• Writing Double Functions tfuncts.cc