How to define the type of variable in the execution, when that type depends of the input (C++)?

Question

I'm doing a program that takes a type of variable as input, such as char, int, string, and so on; and prints the size in bytes of that type of variable with sizeof() function. But I have to declare the type of the input variable before the user enters it. There is any way to define the type in run time?, as it depends of input.

Answer 1

I think it goes against the concept of static typing discipline of C++. Although, it would be a great chance to learn, in case it was possible.

I also think that use of dynamic typing language for such plan is in order.