CS 101 - 10/6/11

Increment and Decrement operators

  ++   increases the value by 1
  --   decreases the value by 1

     int x;

     x = 7;

     // examples of the post-increment operator
     x++;    // increments the value to 8
     x--;    // decrements the value back to 7

     // examples of the pre-increment operator
     ++x;    // increments gthe value to 8
     --x;    // decrements the value back to 7

     Even though the world mostly uses post-increment
       we should be using the pre-increment


         Examples of confusion with the ++ operator
            y = x++;    or   y = ++x;

         The above is poor programming style because
          is causes two variables to be  modified in
          a single statement.  Good style has us only
          modifying a single variable per statement.
      
            

 Type Error -  When we are assigning a value of one
    type into a variable of another type, we may cause
    a compiler error

    Type Cast: change a value from one type to another
                      type

         y  = (type) x;

       Change the value from x to the type indicated
          inside the parantheses and then store the
          value into y.

        y = (int) x;