derive Debug trait and use dbg!()

Author: polyactis

c5_struct/src/main.rs

@@ -1,4 +1,4 @@
-
+#[derive(Debug)]
 struct Rectangle {
     width: u32,
     height: u32,
@@ -42,9 +42,10 @@ fn main() {
         "The area of the rectangle is {} square pixels.",
         rect1.area()
     );
+    let scale=2;
 
     let rect1 = Rectangle {
-        width: 30,
+        width: dbg!(30*scale),
         height: 50,
     };
     let rect2 = Rectangle {
@@ -55,7 +56,9 @@ fn main() {
         width: 60,
         height: 45,
     };
-
+    // dbg!() takes ownership of an expression. We use & instead.
+    dbg!(&rect1);
+    dbg!(&rect3);
     println!("Can rect1 hold rect2? {}", rect1.can_hold(&rect2));
     println!("Can rect1 hold rect3? {}", rect1.can_hold(&rect3));