Print input from stdin

src/main.rs

@@ -1,3 +1,9 @@
+use std::io;
+use std::io::prelude::*;
+
 fn main() {
-    println!("Hello, world!");
+    let stdin = io::stdin();
+    for line in stdin.lock().lines() {
+        println!("{}", line.unwrap());
+    }
 }