structs and methods

rectangle/Cargo.toml

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+[package]
+name = "rectangle"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

rectangle/src/main.rs

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+// Building up to structs
+//
+// fn main() {
+//     let width1 = 30;
+//     let height1 = 50;
+//
+//     println!(
+//         "The area of the rectangle is {} square pixels",
+//         area(width1, height1)
+//     );
+// }
+//
+// fn area(w: u32, h: u32) -> u32 {
+//     w * h
+// }
+
+// fn main() {
+//     let rect1 = (30, 50);
+//
+//     println!("The area of the rectangle is {} square pixels", area(rect1))
+// }
+//
+// fn area(dims: (u32, u32)) -> u32 {
+//     dims.0 * dims.1
+// }
+
+#[derive(Debug)]
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+fn area(rec: &Rectangle) -> u32 {
+    rec.width * rec.height
+}
+
+fn main() {
+    let scale = 3;
+    let my_rec = Rectangle {
+        width: dbg!(30 * scale),
+        height: 40,
+    };
+
+    dbg!(&my_rec);
+
+    // println!(
+    //     "The area of the rectangle is {} square pixels",
+    //     area(&my_rec)
+    // );
+    //
+    // println!("rectangle is {my_rec:?}");
+    // println!("--------");
+    // println!("rectangle is {my_rec:#?}");
+}