Calling constructors in c++ without new

Question

I\'ve often seen that people create objects in C++ using

Thing myThing(\"asdf\");

Instead of this:

Thing myThing = Thing(\"         


        

Answer 1

Quite simply, both lines create the object on the stack, rather than on the heap as 'new' does. The second line actually involves a second call to a copy constructor, so it should be avoided (it also needs to be corrected as indicated in the comments). You should use the stack for small objects as much as possible since it is faster, however if your objects are going to survive for longer than the stack frame, then it's clearly the wrong choice.