Lecture 21: Exceptions

Thursday 04/19, 2007

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Assigned Reading:  18

Slides As Shown:

• Announcements, etc: [slide view] [print view]

• Exceptions: [slide view] [print view]

Topics Covered:

• The main topic for this lecture is exceptions. See slides, also lecture notes from Dennis Frey.

• We used the two-dimensional array example from the previous lecture]. When the array indices are out of bounds, we want to throw an exception instead of exiting the program.

  • In this example, the OutOfBounds class is an empty class but can be used to throw exceptions of that type: twodim10.h, twodim10.cpp and tdtest10.cpp.

  • The next version of OutOfBounds lets you store a string in the throw operand: twodim11.h, twodim11.cpp and tdtest11.cpp.

  • A more complicated version of OutOfBounds lets you report the value of the offending index: twodim12.h, twodim12.cpp and tdtest12.cpp.

  • Trying out exceptions mixed in with std::exception derived classes: vtest2.cpp