How do you define a good or bad API? [closed]

Answer 1

There are several other good answers on this already, so I thought I'd just throw in some links I didn't see mentioned.

Articles

1. "A Little Manual Of API Design" by Jasmin Blanchette of Trolltech
2. "Defining QT-Style C++ APIs" also Trolltech

Books:

1. "Effective Java" by Joshua Bloch
2. "The Practice Of Programming" by Kernighan and Pike