It's essential to follow pjmlp's advice, since C does otherwise not give a lot of feedback about one's mistakes: learning from one's mistakes might take a long

It's essential to follow pjmlp's advice, since C does otherwise not give a lot of feedback about one's mistakes: learning from one's mistakes might take a long time since a quite broken program (think overwriting past memory strictly allocated for one entity) might still lead to a working program. Use your compiler, use it well with all its warnings. Run your programs under valgrind or some such.