main : ajout fonction exit

src/main.rs

@@ -1,6 +1,11 @@
 use std::io;
 use std::io::Write;
 
+fn exit() {
+    println!("exit");
+    std::process::exit(0);
+}
+
 fn main() {
     let mut user_input = String::new();
     let mut bytes_read = 1;