C++ make a variable type depend on user input

Question

I want a function that creates an array for testing purposes:

• The idea es to make the user select the type of elements the array will contain (int, float, doub

Answer 1

The simple answer is that you cannot, because data types need to be specifically declared at compile time.

If you can use boost libraries,

boost::variant vec;

can suit your needs.

You cannot use union because std::vector is not a POD (Plain Old Datatype).

EDIT:

As @Rob pointed out:

Void pointers need to be converted into a pointer to something else - at compile time - before they can be used that way. So the answer is still "cannot" use void pointers to make a variable data type.