CPS 6 Ramm - Spring 2001 - 1/22/01 #5

Chapter 2: C++ Programs: Form and Function

• Type: int Numbers
  • define/declare integers
    int count, k, year;
  • max, min
  • micros, workstations

• Type: double Numbers
  • define/declare doubles
    double x, rate, balance;

• Arithmetic Operators/Operands
  • + addition
  • - subtraction
  • * multiplication
  • / division
  • % modulus/remainder

• Example: Collision at -40
  tempscale.cpp
  
  
  

• Operator Precedence
  • ( )
  • *, /, %
  • +, -
  • left to right

• Automatic int to double conversion

• Classes and Types

• Objects and Variables

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

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

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

• Relational Operators

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

• Assignment Statement: ... = ...
  • Snuck it into the last program
  • Pronounce gets rather than equals

• Value of Relational Operations
  true = 1
  false = 0

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

• Short Circuit Evaluation exhaust4.cpp
  
  
  
  
  
  

• C++ Operator Precedence

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

  When in doubt, parenthesize