Answer 1

If you make a variable static, it "remembers" it's value between function calls. So the first time you run `stat`, `n` gets set to 0, then after `n++`, it will be 1.
The second time you call `stat`, n will still be 1, and after `n++`, it will be 2.

`m` is just an ordinary variable, it will be set to 0 every time you call `stat`, and after `m++`, it will be 1.