The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.

C is a razor-sharp tool, with which one can create an elegant and efficient program or a bloody mess.

Trivia rarely affect efficiency. Are all the machinations worth it, when their primary effect is to make the code less readable?

If you're as clever as you can be when you write it, how will you ever debug it?

An effective way to test code is to exercise it at its natural boundaries

90% of the functionality delivered now is better than 100% delivered never.

Some compilers allow a check during execution that subscripts do not exceed array dimensions. This is a help, but not sufficient. First, many programmers do not use such compilers because They're not efficient. (Presumably, this means that it is vital to get the wrong answers quickly.)