C++: can't static_cast from double* to int*

Question

When I try to use a static_cast to cast a double* to an int*, I get the following error:

invalid static_cast from type ‘double*’ to type ‘int*’

Answer 1

Because you used double * instead of double

The * after it means that you are declaring a pointer, which is vastly different from a regular double.

C++ can not safely static_cast a pointer to a different type of pointer like that.

If you are wanting to do this kinda thing, you must first dereference the variable.

r=new int(static_cast(*p));

You must use new because a double and an integer can not reside in the same memory space(sanely)