210918

rust_project/enumSmp/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "enumSmp"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

rust_project/enumSmp/src/main.rs

@@ -0,0 +1,27 @@
+fn main() {
+    enum Coin {
+        Penny,
+        Nickel,
+        Dime,
+        Quarter,
+    }
+
+
+    fn value_in_cents(coin: Coin) -> u32 {
+        match coin {
+            Coin::Penny => {
+                println!("Lucky penny!");
+                1
+            },
+            Coin::Nickel => 5,
+            Coin::Dime => 10,
+            Coin::Quarter => 25,
+        }
+    }
+
+    let some_u8_value = Some(0u8);
+    match some_u8_value {
+        Some(3) => println!("three"),
+        _ => (),
+    }
+}

rust_project/rectangles/src/main.rs

@@ -1,3 +1,70 @@
+#[derive(Debug)]
+
+struct Rectangle {
+    width: u32,
+    height: u32,
+}
+
+impl Rectangle {
+    fn area4(&self) -> u32 {
+        self.width * self.height
+    }
+
+    fn can_hold(&self, other: other: &Rectangle) -> bool {
+        self.width > other.width && self.height > other.height
+    }
+}
+
+fn smp_main5() {
+    let rect1 = Rectangle { width: 30, height: 50 };
+    let rect2 = Rectangle { width: 10, height: 40 };
+    let rect3 = Rectangle { width: 60, height: 45 };
+
+    println!("Can rect 1 hold rect2? {}", rect1.can_hold(&rect2))
+    println!("Can rect 1 hold rect3? {}", rect1.can_hold(&rect3))
+}
+
+fn smp_main4() {
+    let rect1 = Rectangle { width: 30, height: 50 };
+
+    println!(
+        "The area of the rectangle is {} suare pixels.",
+        rect1.area4()
+    );
+}
+
+fn smp_main3() {
+    let rect1 = Rectangle { width: 30, height: 50};
+
+    println!("rect1 is {:?}", rect1);
+}
+
+fn smp_main2() {
+    let rect1 = Rectangle { width: 30, height: 50};
+
+    println!(
+        "The area of the rectangle is {} square pixels.",
+        area3(&rect1)
+    );
+}
+
+fn area3(rectangle: &Rectangle) -> u32 {
+    rectangle.width * rectangle.height
+}
+
+fn smp_main() {
+    let rect1 = (30, 50);
+
+    println!(
+        "The area of the rectangle is {} square pixels.",
+        area2(rect1)
+        )
+}
+
+fn area2(dimensions: (u32, u32)) -> u32 {
+    dimensions.0 * dimensions.1
+}
+
 fn area(width: u32, height: u32) -> u32 {
     width * height
 }
@@ -10,5 +77,10 @@ fn main() {
         "The area of the rectangle is {} square pixels.",
         area(width1, height1)
         );
+
+    smp_main();
+    smp_main2();
+    smp_main3();
+    smp_main4();
 }