Default values, cloning and copying

1_concepts/1_1_default_clone_copy/src/main.rs

@@ -1,3 +1,29 @@
+mod dots {
+    #[derive(Debug, Clone, Copy, Default)]
+    pub struct Point {
+        pub x: i32,
+        pub y: i32,
+    }
+
+    #[derive(Debug, Clone)]
+    pub struct Polyline {
+        pub points: Vec<Point>
+    }
+
+    impl Polyline {
+        pub fn new(points: Vec<Point>) -> Self {
+            if points.len() > 0 {
+                Polyline {points} 
+            } else {
+                panic!("Add at least one Point")
+            }
+        }
+    }
+}
+
 fn main() {
-    println!("Implement me!");
+    let a = dots::Point {x: 3, y: 2};
+    let b = dots::Polyline::new(vec![a]);
+
+    println!("{} {} {:?}", a.x, a.y, b.points);
 }