Refined Ch02.

projects/guessing_game/src/main.rs

@@ -1,34 +1,42 @@
-use std::io;
-use std::cmp::Ordering;
 use rand::Rng;
+use std::{cmp::Ordering, io, process};
 
 fn main() {
-    println! ("请猜数！");
-
-    let secret_number = rand::thread_rng().gen_range(1..=100);
-
-    // println! ("秘密数字为：{secret_number}");
-
     loop {
-        println! ("请输入你的猜数。");
+        println! ("\n---猜出这个数来！---");
 
-        let mut guess = String::new();
+        let secret_number: u32 = rand::thread_rng().gen_range(1..101);
 
-        io::stdin()
-            .read_line(&mut guess)
-            .expect("读取行失败/failed to read line");
+        // println! ("随机生成的秘密数字为：{}", secret_number);
 
-        let guess: u32 = guess.trim().parse().expect("请输入一个数字！");
+        loop {
+            println! ("请输入你猜的数。（ ‘Q/quit’ 退出游戏）");
 
-        println! ("你猜的是：{guess}");
+            let mut guess: String = String::new();
 
-        match guess.cmp(&secret_number) {
-            Ordering::Less => println! ("太小！"),
-            Ordering::Greater => println! ("太大！"),
-            Ordering::Equal => {
-                println! ("你赢了！");
-                break;
-            },
+            io::stdin()
+                .read_line(&mut guess)
+                .expect("读取行失败/failed to read line");
+
+            if guess.trim().eq("Q") || guess.trim().eq("quit") { process::exit(0); }
+
+            // let guess: u32 = guess.trim().parse().expect("请输入一个数字！");
+            let guess: u32 = match guess.trim().parse() {
+                Ok(num) => num,
+                Err(_) => { println! ("请输入一个数字！"); continue },
+            };
+
+            println! ("你猜的数为：{}", guess);
+
+            match guess.cmp(&secret_number) {
+                Ordering::Less => println! ("太小！"),
+                Ordering::Greater => println! ("太大！"),
+                Ordering::Equal => {
+                    println! ("你赢了！");
+                    break
+                },
+            }
         }
     }
 }
+