Question

If a class has only one constructor with one parameter, how to declare an array? I know that vector is recommended in this case. For example, if I have a class

class Foo{

public:
Foo(int i) {}

}

How to declare an array or a vector which contains 10000 Foo objects?

Answer 1

For an array you would have to provide an initializer for each element of the array at the point where you define the array.

For a vector you can provide an instance to copy for each member of the vector.

e.g.

std::vector<Foo> thousand_foos(1000, Foo(42));