CS 101 - 11/8/11

Labs this week (Friday, 11/11/11) will be held in 

          2249 SEL

   right across the hall from normal lab location.
---------------------

Exam 2 - Thursday, 11/10/11, during lecture

Format is the same as Exam 1

 - 20 multiple choice questions
 -  2 write code questions

Topics:
  - Picture manipulation
  -  each pixel has two sets of data
       - color information 
       - X,Y position of the pixel

  - Java Statements (Trace code questions)
      - for loops
      - nested loops
      - If statements
      - Nested If and loop statement
      - Boolean Operators
          && and
          || or
           ! not

         Truth table
       X  Y |    X && Y    X || Y   !X
       ================================
       T  T |       T         T      F
       T  F |       F         T      F
       F  T |       F         T      T
       F  F |       F         F      T

          ((x < 5  && y >= 7) || (x != 3 && z == 0))
            ( T    &&     F ) ||  (  T   &&    T )
                    F         ||          T
                               T

      - methods
          return statement/ return value
          parameters
          First line of the method

     y = 0; z = 0;

    for ( x = 0 ; x < 5 ; x++)
       {
          z = y + z;
          y = x + y;
       }

===============
     y = 0; z = 0;

    for ( x = 0 ; x < 5 ; x++)
       {
          z = y + z;
          if (y < 4 )
            {
             y = x + y;
            }
       }
==============
    x  = -7; z = 0;

    if ( x < -5 )
       z = z + 1;
    else if (x < 0 )
       z  = z + 2;
    else if (x < 5 )
       z  = z + 3;
  

===============
     x  = -7; z = 0;

    if ( x < -5 )
       z = z + 1;
    if (x < 0 )
       z  = z + 2;
    if (x < 5 )
       z  = z + 3;
================
     x  = -7; z = 0;

    if ( x < -5 )
       z = z + 1;
    else if (x < 0 )
       z  = z + 2;
    else if (x < 5 )
       z  = z + 3;
    else
       z = z + 4;