my rustlng answer 5.1 ~ 6

Signed-off-by: IloveKanade <xjlgxlgx@gmail.com>

exercises/enums/enums1.rs

@@ -1,16 +1,18 @@
 // enums1.rs
 // Make me compile! Execute `rustlings hint enums1` for hints!
 
-// I AM NOT DONE
 
 #[derive(Debug)]
 enum Message {
-    // TODO: define a few types of messages as used below
+    Quit,
+    Echo { x: i32, y: i32 },
+    Move(String),
+    ChangeColor(i32, i32, i32),
 }
 
 fn main() {
     println!("{:?}", Message::Quit);
-    println!("{:?}", Message::Echo);
-    println!("{:?}", Message::Move);
-    println!("{:?}", Message::ChangeColor);
+    println!("{:?}", Message::Echo{x:1,y:2});
+    println!("{:?}", Message::Move(String::from("dddd")));
+    println!("{:?}", Message::ChangeColor(255,255, 0));
 }

exercises/enums/enums2.rs

@@ -6,6 +6,10 @@
 #[derive(Debug)]
 enum Message {
     // TODO: define the different variants used below
+    Move{x: i32,y: i32},
+    Echo(String),
+    ChangeColor(i32, i32, i32),
+    Quit,
 }
 
 impl Message {

exercises/enums/enums3.rs

@@ -1,10 +1,12 @@
 // enums3.rs
 // Address all the TODOs to make the tests pass!
 
-// I AM NOT DONE
-
 enum Message {
     // TODO: implement the message variant types based on their usage below
+    ChangeColor(u8, u8, u8),
+    Echo(String),
+    Move{x: u8, y: u8},
+    Quit
 }
 
 struct Point {
@@ -37,6 +39,12 @@ impl State {
 
     fn process(&mut self, message: Message) {
         // TODO: create a match expression to process the different message variants
+        match message {
+            Message::ChangeColor(r, g, b) => self.change_color((r, g, b)),
+            Message::Echo(s) => self.echo(s),
+            Message::Move{x, y} => self.move_position(Point{x, y}),
+            Message::Quit => self.quit()
+        }
     }
 }
 
@@ -51,9 +59,9 @@ mod tests {
             position: Point { x: 0, y: 0 },
             color: (0, 0, 0),
         };
-        state.process(Message::ChangeColor((255, 0, 255)));
+        state.process(Message::ChangeColor(255, 0, 255));
         state.process(Message::Echo(String::from("hello world")));
-        state.process(Message::Move(Point { x: 10, y: 15 }));
+        state.process(Message::Move{ x: 10, y: 15 });
         state.process(Message::Quit);
 
         assert_eq!(state.color, (255, 0, 255));

exercises/structs/structs1.rs

@@ -1,13 +1,13 @@
 // structs1.rs
 // Address all the TODOs to make the tests pass!
 
-// I AM NOT DONE
-
 struct ColorClassicStruct {
     // TODO: Something goes here
+    name: String,
+    hex: String
 }
 
-struct ColorTupleStruct(/* TODO: Something goes here */);
+struct ColorTupleStruct(String, String);
 
 #[derive(Debug)]
 struct UnitStruct;
@@ -19,7 +19,10 @@ mod tests {
     #[test]
     fn classic_c_structs() {
         // TODO: Instantiate a classic c struct!
-        // let green =
+        let green = ColorClassicStruct {
+            name: String::from("green"),
+            hex:String::from("#00FF00")
+        };
 
         assert_eq!(green.name, "green");
         assert_eq!(green.hex, "#00FF00");
@@ -28,7 +31,7 @@ mod tests {
     #[test]
     fn tuple_structs() {
         // TODO: Instantiate a tuple struct!
-        // let green =
+        let green = ColorTupleStruct(String::from("green"), String::from("#00FF00"));
 
         assert_eq!(green.0, "green");
         assert_eq!(green.1, "#00FF00");
@@ -37,7 +40,7 @@ mod tests {
     #[test]
     fn unit_structs() {
         // TODO: Instantiate a unit struct!
-        // let unit_struct =
+        let unit_struct = UnitStruct;
         let message = format!("{:?}s are fun!", unit_struct);
 
         assert_eq!(message, "UnitStructs are fun!");

exercises/structs/structs2.rs

@@ -34,7 +34,11 @@ mod tests {
     fn your_order() {
         let order_template = create_order_template();
         // TODO: Create your own order using the update syntax and template above!
-        // let your_order =
+        let your_order = Order {
+            name: "Hacker in Rust".to_string(),
+            count: 1,
+            ..order_template
+        };
         assert_eq!(your_order.name, "Hacker in Rust");
         assert_eq!(your_order.year, order_template.year);
         assert_eq!(your_order.made_by_phone, order_template.made_by_phone);

exercises/structs/structs3.rs

@@ -4,8 +4,6 @@
 // Make the code compile and the tests pass!
 // If you have issues execute `rustlings hint structs3`
 
-// I AM NOT DONE
-
 #[derive(Debug)]
 struct Package {
     sender_country: String,
@@ -17,6 +15,7 @@ impl Package {
     fn new(sender_country: String, recipient_country: String, weight_in_grams: i32) -> Package {
         if weight_in_grams <= 0 {
             // panic statement goes here...
+            panic!("wtf,weight is less than zero")
         } else {
             Package {
                 sender_country,
@@ -26,12 +25,16 @@ impl Package {
         }
     }
 
-    fn is_international(&self) -> ??? {
-        // Something goes here...
+    fn is_international(&self) -> bool {
+        if self.sender_country != self.recipient_country {
+            true
+        } else {
+            false
+        }
     }
 
-    fn get_fees(&self, cents_per_gram: i32) -> ??? {
-        // Something goes here...
+    fn get_fees(&self, cents_per_gram: i32) -> i32 {
+        self.weight_in_grams * cents_per_gram
     }
 }