What are some C++ related idioms, misconceptions, and gotchas that you've learnt from experience?

Question

What are some C++ related idioms, misconceptions, and gotchas that you\'ve learnt from experience?

An example:

class A
{
  public: 
  char s[1024];
  cha         


        

Answer 1

Never waste time on trying to implement the copy operations on classes when we don't know if it will be required later. Many objects we handle are just entities, and copying them hardly make any sense. Make them non-copyable, and implement the copy/duplication later if the need really arises.