Add rust file (.rs)

numguess.rs

@@ -0,0 +1,34 @@
+extern crate rand;
+
+use std::io;
+use std::cmp::Ordering;
+use rand::Rng;
+
+fn main() {
+    println!("guess a number:");
+
+    let secret_number = rand::thread_rng().gen_range(10000, 99999);
+    let mut tries = 0;
+
+    loop {
+        let mut guess = String::new();
+
+        io::stdin().read_line(&mut guess)
+            .expect("Failed to read line");
+
+        let guess: u32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => continue,
+        };
+        tries = tries + 1;
+
+        match guess.cmp(&secret_number) {
+            Ordering::Less => println!("higher"),
+            Ordering::Greater => println!("lower"),
+            Ordering::Equal => {
+                println!("match found in {} tries", tries);
+                break;
+            }
+        }
+    }
+}