Array Problems/Special Cases

• An Out of Bounds array index is an index value that is either less than zero or greater than or equal to the declared size of an array.
  • There is no way to automatically detect this at run time.
  • You MUST do it by hand.
  • Before you use an array index, make sure that it is in bounds.
  • If your program behaves in an unpredicted way, or crashes and it includes an array, check for out of bounds array index errors.
  • If you are lucky your program will crash from an array out of bounds error.
  • If you are not, it will just run.
• Arrays do not support aggregate operations.
  • Input and output on an array must be done by "hand"
    • cout << array is not valid.
  • Comparison does not work as you expect
    • Comparison uses the base address, not an item by item comparison.
  • No assignment operator
  • No arithmetic
• Passing to functions
  • Arrays are always passed by reference.
  • This is because a pass by value would require all of the data to be copied.
  • And that is expensive for large arrays.
  • But you can Function (const int array[]); in c++
• Not new, but arrays are not iniltalized