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

I can't say that I am an experienced C++ programmer but I have recently learned how hard it is to pass and array of arrays as a function parameter. Try to avoid this at all cost :(

If you know the size at compile its simple. Even if you know one of the dimensions at compile time. If you simply don't know... you might be looking at something like this

m[i*dim2+j]

Being i the iterator for the rows, dim2 the number of cols and j the iterator for the cols.