_

src/interactive.rs

@@ -0,0 +1,29 @@
+fn o_ption() {
+    println!("what's your name, noble worrior?");
+    let mut buf = String::new();
+    use std::io;
+    io::stdin().read_line(&mut buf)
+        .ok()
+        .expect("Failed to read stdin");
+    let buf = buf.trim();
+    println!("{}, that's a mighty name indeeeeed.", buf);
+}
+
+fn p_arse() {
+    let mut buf = String::new();
+    println!("Enter a number: ");
+    use std::io;
+    io::stdin().read_line(&mut buf)
+        .ok()
+        .expect("Not a number!");
+    let input_num: Result<u32, _> = buf.trim().parse();
+    match input_num {
+        Ok(num) => println!("You entered the number {}", num),
+        Err(ex) => println!("Cannot be parsed as a number: {}", ex)
+    };
+}
+
+fn main() {
+    o_ption();
+    p_arse();
+}

src/main.rs

@@ -66,12 +66,12 @@ fn hmap() {
 
 fn wat() {
     type _Dingus = &'static str;
-    // what the heck is going on here? I the book says
+    // what the heck is going on here? I the book says...
     struct Zoo {
         n: _Dingus,
     }
     let _z = Zoo { n: "foo" };
-    // In what other context can I use _dingus?
+    // ...In what other context can I use _Dingus?
 }
 
 fn main() {
@@ -81,4 +81,5 @@ fn main() {
     hmap();
     s_truct();
     e_num();
+    o_ption();
 }