$ cargo build
   Compiling libc v0.2.86
   Compiling getrandom v0.2.2
   Compiling cfg-if v1.0.0
   Compiling ppv-lite86 v0.2.10
   Compiling rand_core v0.6.2
   Compiling rand_chacha v0.3.0
   Compiling rand v0.8.5
   Compiling guessing_game v0.1.0 (file:///projects/guessing_game)
error[E0308]: mismatched types
   --> src/main.rs:22:21
    |
22  |     match guess.cmp(&secret_number) {
    |                 --- ^^^^^^^^^^^^^^ expected `&String`, found `&{integer}`
    |                 |
    |                 arguments to this method are incorrect
    |
    = note: expected reference `&String`
               found reference `&{integer}`
note: method defined here
   --> file:///home/.rustup/toolchains/1.82/lib/rustlib/src/rust/library/core/src/cmp.rs:838:8
    |
838 |     fn cmp(&self, other: &Self) -> Ordering;
    |        ^^^

For more information about this error, try `rustc --explain E0308`.
error: could not compile `guessing_game` (bin "guessing_game") due to 1 previous error
