guessing game!

guessing_game/.gitignore

@@ -0,0 +1,2 @@
+target/
+Cargo.lock

guessing_game/Cargo.lock

@@ -1,5 +1,84 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
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+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "guessing_game"
 version = "0.1.0"
+dependencies = [
+ "rand",
+]
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guessing_game/Cargo.toml

@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+rand = "0.7.3"

guessing_game/src/main.rs

@@ -1,12 +1,52 @@
+/* 
+ * Simple number guessing game I made using the tutorial at 
+ * https://doc.rust-lang.org/stable/book/ch02-00-guessing-game-tutorial.html
+ */
+
 use std::io;
+use std::cmp::Ordering;
+use rand::Rng;
 
 fn main() {
-    println!("Number guessing game!");
-    print!("Choose a number between 0 and 100: ")
+    // Generates random number between 0 and 100, thread_rng is the generator we're using
+    let number = rand::thread_rng().gen_range(0, 101);
+    let mut tries = 1;
+    
+    println!("Choose a number between 0 and 100: ");
 
-    let mut guess = String::new();
+    loop {
+        // Defines a mutable variable that returns a string, don't know why constants exist yet
+        let mut guess = String::new();
 
-    io.stdin()
-        .read_line(&mut guess)
-        
+        // the & symbol in front of mut means its a reference, whatever that means lol
+        io::stdin()
+            .read_line(&mut guess)
+            .expect("Failed to read line.");
+
+        // Remove whitespace and convert the input into an unsigned 32 bit integer, using match statement to handle err
+        let guess: u32 = match guess.trim().parse() {
+            Ok(num) => num,
+            Err(_) => {
+                println!("Invalid input, please type a number!");
+                continue;
+            }
+        };
+
+        // Checks whether the guess is higher, lower or equal to the random number
+        // I added a tries thing myself, that tells you how many turns it took for you to guess the number
+        match guess.cmp(&number) {
+            Ordering::Less => {
+                println!("Higher!");
+                tries += 1;
+            }
+            Ordering::Greater => {
+                println!("Lower!");
+                tries += 1;
+            }
+            Ordering::Equal => {
+                println!("You win! You took {} tries to guess the number.", tries);
+                break;
+            }
+        }
+    }
 }

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