rust port of craps

29_Craps/rust/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "rust"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rand = "0.8.5"

29_Craps/rust/src/craps_game.rs

@@ -0,0 +1,141 @@
+use crate::util;
+
+enum GameState {
+    ComeOut,
+    PointRolls,
+    GameOver,
+}
+
+pub struct CrapsGame {
+    wallet: usize,
+    bet: usize,
+    point: u8,
+    state: GameState,
+}
+
+impl CrapsGame {
+    pub fn new() -> Self {
+        let wallet = util::read_numeric("\nHow much money do you want to start with?");
+
+        CrapsGame {
+            wallet,
+            bet: 0,
+            point: 0,
+            state: GameState::ComeOut,
+        }
+    }
+
+    pub fn tick(&mut self) -> bool {
+        use GameState::*;
+
+        match self.state {
+            ComeOut => self.new_round(),
+            PointRolls => self.point_roll(),
+            GameOver => false,
+        }
+    }
+
+    fn point_roll(&mut self) -> bool {
+        let point = self.point;
+
+        println!("Rolling {point} wins. 7 loses.");
+
+        self.prompt_roll();
+        let roll = CrapsGame::roll();
+
+        if roll == point {
+            self.player_win();
+        } else if roll == 7 {
+            self.player_lose();
+        }
+
+        true
+    }
+
+    fn new_round(&mut self) -> bool {
+        println!("\nCome out roll.");
+        println!("7 and 11 win. 2, 3 and 12 lose.\n");
+
+        loop {
+            self.bet = util::read_numeric("Enter your bet:");
+
+            if self.bet <= self.wallet {
+                break;
+            } else {
+                println!("You don't have that much money!");
+            }
+        }
+
+        self.prompt_roll();
+        let point = CrapsGame::roll();
+
+        match point {
+            11 | 7 => {
+                self.player_win();
+            }
+            2 | 3 | 12 => {
+                self.player_lose();
+            }
+            _ => {
+                self.point = point;
+                self.state = GameState::PointRolls
+            }
+        }
+
+        true
+    }
+
+    fn player_win(&mut self) {
+        let bet = self.bet;
+
+        println!("You won ${bet}!");
+
+        self.wallet += bet;
+        self.print_wallet();
+
+        self.state = GameState::ComeOut;
+    }
+
+    fn player_lose(&mut self) {
+        let bet = self.bet;
+
+        println!("You lost ${bet}!");
+
+        self.wallet -= bet;
+        self.print_wallet();
+
+        if self.wallet == 0 {
+            self.game_over();
+        } else {
+            self.state = GameState::ComeOut;
+        }
+    }
+
+    fn print_wallet(&self) {
+        println!("\nYou have ${} in your wallet.", self.wallet);
+    }
+
+    fn roll() -> u8 {
+        use rand::Rng;
+
+        let roll = rand::thread_rng().gen_range(2..13);
+        println!("\nYou rolled {}.", roll);
+
+        roll
+    }
+
+    fn game_over(&mut self) {
+        self.state = GameState::GameOver;
+    }
+
+    fn prompt_roll(&mut self) {
+        use util::Response::*;
+
+        let response = util::prompt("Ready to roll?");
+
+        match response {
+            Yes => (),
+            No => self.game_over(),
+        }
+    }
+}

29_Craps/rust/src/main.rs

@@ -0,0 +1,27 @@
+mod craps_game;
+mod util;
+use crate::craps_game::CrapsGame;
+
+fn main() {
+    println!("~~Craps~~");
+    println!("Creative Computing Morristown, New Jersey\n");
+
+    let mut quit = false;
+
+    while !quit {
+        let mut game = CrapsGame::new();
+
+        loop {
+            if !game.tick() {
+                use util::Response::*;
+
+                match util::prompt("New Game?") {
+                    Yes => (),
+                    No => quit = true,
+                }
+
+                break;
+            }
+        }
+    }
+}

29_Craps/rust/src/util.rs

@@ -0,0 +1,71 @@
+use std::io;
+
+pub enum Response {
+    Yes,
+    No,
+}
+
+pub fn read_line() -> String {
+    let mut input = String::new();
+
+    io::stdin()
+        .read_line(&mut input)
+        .expect("Error reading line.");
+
+    input
+}
+
+pub fn read_numeric(message: &str) -> usize {
+    loop {
+        println!("{}", message);
+
+        let mut ok = true;
+
+        let input = read_line();
+
+        for c in input.trim().chars() {
+            if !c.is_numeric() {
+                println!("You can only enter a number!");
+                ok = false;
+                break;
+            }
+        }
+
+        if ok {
+            let input = input.trim().parse();
+
+            let _ = match input {
+                Ok(i) => return i,
+                Err(e) => {
+                    println!("please input a number ({})", e);
+                }
+            };
+        }
+    }
+}
+
+pub fn prompt(msg: &str) -> Response {
+    use Response::*;
+
+    let mut _r = Response::Yes;
+
+    loop {
+        println!("\n{}", msg);
+
+        let response = read_line().trim().to_uppercase();
+
+        match response.as_str() {
+            "YES" | "Y" => {
+                _r = Yes;
+                break;
+            }
+            "NO" | "N" => {
+                _r = No;
+                break;
+            }
+            _ => println!("Please input (Y)es or (N)o."),
+        };
+    }
+
+    _r
+}