Init.

1 files changed, 48 insertions, 0 deletions

diff --git a/rust-book/enums/src/main1.rs b/rust-book/enums/src/main1.rs
new file mode 100755
index 0000000..9670693
--- /dev/null
+++ b/rust-book/enums/src/main1.rs
@@ -0,0 +1,48 @@
+#[derive(Debug)]
+enum UsState {
+    NY,
+    VA,
+    NC,
+}
+
+enum Coin {
+    Penny,
+    Nickel,
+    Dime,
+    Quarter(UsState),
+}
+
+impl Coin {
+
+    fn value_in_cents(self) -> u32 {
+
+        match self {
+            Coin::Penny => {
+                println!("lucky penny");
+                1
+            },
+            Coin::Nickel => 5,
+            Coin::Dime => 10,
+            Coin::Quarter(state) => {
+                println!("State quarter from {:?}", state);
+                25
+            },
+
+        }
+
+    }
+}
+
+fn plus_one(x: Option<i32>) -> Option<i32> {
+    
+    match x {
+        None => None,
+        Some(i) => Some(i + 1),
+    }
+}
+
+fn main() {
+    let five = Some(5);
+    let six = plus_one(five);
+    let none = plus_one(None);
+}