volatile vs. mutable in C++

Question

I have a question about the difference between volatile and mutable. I noticed that both of the two means that it could be changed. What else? Are they the same thing? What\

Answer 1

A variable marked mutable allows for it to be modified in a method declared const.

A variable marked volatile tells the compiler that it must read/write the variable every time your code tells it too (i.e. it cant optimize away accesses to the variable).