Adding results enum for the game.

src/prob2/mod.rs

@@ -1,10 +1,16 @@
-#[repr(u8)]
+#[derive(PartialEq, Eq)]
 pub enum Play {
     Rock,
     Paper,
     Scissors,
 }
 
+enum ResultPlay {
+    Win,
+    Draw,
+    Loss,
+}
+
 impl Into<char> for Play {
     fn into(self) -> char {
         match self {