diff --git a/src/io/mod.rs b/src/io/mod.rs
index 4c95642..dbbb0a4 100644
--- a/src/io/mod.rs
+++ b/src/io/mod.rs
@@ -1,3 +1,39 @@
+use std::io;
+use io::{
+    stdin,
+    stdout,
+    Write,
+};
+
+mod parser;
+
 pub fn run() -> i32 {
-    todo!();
+    let mut buffer = String::new();
+    let mut bytes_read_result: io::Result<usize>;
+    let mut bytes_read: usize = 1;
+
+    while bytes_read != 0 {
+        buffer.clear();
+
+        print!("$ ");
+        if stdout().flush().is_err() {
+            eprintln!("error: can't fully flush stdout or reached EOF");
+        }
+        bytes_read_result = stdin().read_line(&mut buffer);
+
+        if bytes_read_result.is_err() {
+            eprintln!("error: invalid UTF-8 characters were read");
+            bytes_read = 1;
+        } else {
+            bytes_read = bytes_read_result.unwrap();
+            if bytes_read != 0 {
+                let command_vec: Vec<String> = parser::parse(&buffer);
+                println!("{:?}", command_vec);
+            }
+        }
+    }
+
+    println!();
+
+    0
 }
diff --git a/src/parser/mod.rs b/src/io/parser/mod.rs
similarity index 100%
rename from src/parser/mod.rs
rename to src/io/parser/mod.rs
diff --git a/src/main.rs b/src/main.rs
index 14c038f..c05e11f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,43 +1,9 @@
-use std::io as stdio;
-use stdio::{
-    stdin,
-    stdout,
-    Write,
-};
 use std::process::exit;
 
-mod parser;
 mod io;
 
 fn main() {
-    let mut buffer = String::new();
-    let mut bytes_read_result: stdio::Result<usize>;
-    let mut bytes_read: usize = 1;
-
     let last_exit_code: i32 = io::run();
 
     exit(last_exit_code);
-
-    while bytes_read != 0 {
-        buffer.clear();
-
-        print!("$ ");
-        if stdout().flush().is_err() {
-            eprintln!("error: can't fully flush stdout or reached EOF");
-        }
-        bytes_read_result = stdin().read_line(&mut buffer);
-
-        if bytes_read_result.is_err() {
-            eprintln!("error: invalid UTF-8 characters were read");
-            bytes_read = 1;
-        } else {
-            bytes_read = bytes_read_result.unwrap();
-            if bytes_read != 0 {
-                let command_vec: Vec<String> = parser::parse(&buffer);
-                println!("{:?}", command_vec);
-            }
-        }
-    }
-
-    println!();
 }