WIP on problem 2

src/lib.rs

@@ -1 +1,2 @@
-pub mod prob1;
+pub mod prob1;
+pub mod prob2;

src/prob2/mod.rs

@@ -0,0 +1,43 @@
+#[repr(u8)]
+pub enum Play {
+    Rock,
+    Paper,
+    Scissors,
+}
+
+impl Into<char> for Play {
+    fn into(self) -> char {
+        match self {
+            Play::Rock => 'X',
+            Play::Paper => 'Y',
+            Play::Scissors => 'Z',
+        }
+    }
+}
+
+impl Into<i32> for Play {
+    fn into(self) -> i32 {
+        match self {
+            Play::Rock => 1,
+            Play::Paper => 2,
+            Play::Scissors => 3,
+        }
+    }
+}
+
+pub fn translate(letter: char) -> Option<Play> {
+    match letter {
+        'A' => Some(Play::Rock),
+        'B' => Some(Play::Paper),
+        'C' => Some(Play::Scissors),
+        _ => None,
+    }
+}
+
+pub fn winning(play: Play) -> char {
+    match play {
+        Play::Rock => Play::Paper.into(),
+        Play::Paper => Play::Scissors.into(),
+        Play::Scissors => Play::Rock.into(),
+    }
+}