Hinzufügen "Beenden mit Strg + D"

src/bin/client.rs

 
     loop {
         let mut buffer = String::new();
-        match std::io::stdin().read_line(&mut buffer){
-            Ok(_n) => {
+        match std::io::stdin().read_line(&mut buffer) {
+            Ok(n) => {
+                if n == 0 {
+                    break;
+                }
                 println!("{}", buffer);
             }
-            Err(_error) =>{
+            Err(_error) => {
                 println!("Fehlerhafte Eingabe!");
                 break;
             }
         }
     }
-} // the stream is closed here
+} // the stream is closed here