improve combat system

src/player.rs

@@ -1,3 +1,4 @@
+use rand::Rng;
 use std::cmp::{max, min};
 
 use crate::position::{HasPosition, Position};
@@ -60,6 +61,10 @@ impl Player {
     pub fn get_experience(&self) -> usize {
         self.experience
     }
+
+    pub fn damage(&self) -> usize {
+        rand::thread_rng().gen_range(1..4)
+    }
 }
 
 impl HasPosition for Player {