$ cargo build
   Compiling libc v0.2.51
   Compiling rand_core v0.4.0
   Compiling rand_core v0.3.1
   Compiling rand v0.5.6
   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 struct `String`, found integer
   |
   = note: expected reference `&String`
              found reference `&{integer}`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0308`.
error: could not compile `guessing_game`

To learn more, run the command again with --verbose.
