From e7e2d2749c9c3a30ed25d3ea4fe86f1ed0ce1423 Mon Sep 17 00:00:00 2001
From: Dan Buch <daniel.buch@gmail.com>
Date: Mon, 5 Sep 2016 22:41:08 -0400
Subject: [PATCH] Ex 3.1

---
 rustbyexample/031/Cargo.lock  |  4 ++++
 rustbyexample/031/Cargo.toml  |  6 ++++++
 rustbyexample/031/src/main.rs | 37 +++++++++++++++++++++++++++++++++++
 3 files changed, 47 insertions(+)
 create mode 100644 rustbyexample/031/Cargo.lock
 create mode 100644 rustbyexample/031/Cargo.toml
 create mode 100644 rustbyexample/031/src/main.rs

diff --git a/rustbyexample/031/Cargo.lock b/rustbyexample/031/Cargo.lock
new file mode 100644
index 0000000..a720929
--- /dev/null
+++ b/rustbyexample/031/Cargo.lock
@@ -0,0 +1,4 @@
+[root]
+name = "031"
+version = "0.1.0"
+
diff --git a/rustbyexample/031/Cargo.toml b/rustbyexample/031/Cargo.toml
new file mode 100644
index 0000000..13d08f7
--- /dev/null
+++ b/rustbyexample/031/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "031"
+version = "0.1.0"
+authors = ["Dan Buch <daniel.buch@gmail.com>"]
+
+[dependencies]
diff --git a/rustbyexample/031/src/main.rs b/rustbyexample/031/src/main.rs
new file mode 100644
index 0000000..4515204
--- /dev/null
+++ b/rustbyexample/031/src/main.rs
@@ -0,0 +1,37 @@
+struct Nil;
+
+struct Pair(i32, f32);
+
+struct Point {
+    x: f32,
+    y: f32,
+}
+
+#[allow(dead_code)]
+struct Rectangle {
+    p1: Point,
+    p2: Point,
+}
+
+fn main() {
+    let point: Point = Point { x: 0.3, y: 0.4 };
+
+    println!("point coordinates: ({}, {})", point.x, point.y);
+
+    let Point { x: my_x, y: my_y } = point;
+
+    let _rectangle = Rectangle {
+        p1: Point { x: my_y, y: my_x },
+        p2: point,
+    };
+
+    let _nil = Nil;
+
+    let pair = Pair(1, 0.1);
+
+    println!("pair contains {:?} and {:?}", pair.0, pair.1);
+
+    let Pair(integer, decimal) = pair;
+
+    println!("pair contains {:?} and {:?}", integer, decimal);
+}