Creating object in c++

Question

if i have a class like this
class Example{
public:
int y;
Example(int x){y = x;}
};

and in main function i try to create two objects with difference ways

Example a = Example(3);
Example b(Example(3));

I know that i can use "Example a(3)" to create object,but what is the difference between object a and b?are they the same?if not,whats the differencd

Answer 1

They are the same, optimization ( copy elision ) makes sure only 1 object is constructed.

Only difference is that they use uglier syntax, but that's just my opinion.

Answer 2

oh..ok
tq for the answer