I have the following code: #include <iostream> #include <vector> struct C { int a; C() : a(0) {} C(int a) : a(a) {} }; std::ostream &operator<<(std::ostream &os, con...

Suppose I have this function: void my_test() { A a1 = A_factory_func(); A a2(A_factory_func()); double b1 = 0.5; double b2(0.5); A c1; A c2 = A(); A c3(A()); } In each grouping, are the...