Single byte input instead of buffering the input

src/interpreter.rs

@@ -9,7 +9,6 @@ pub fn run(program: Vec<u8>) {
 
 	let mut ip: usize = 0;
 	let mut icount: usize = 0;
-	let mut user_input: Vec<u8> = vec![];
 
 	let mut table: HashMap<usize, usize> = HashMap::new();
 	let mut stack: VecDeque<usize> = VecDeque::new();
@@ -55,10 +54,7 @@ pub fn run(program: Vec<u8>) {
 				icount += 1;
 			}
 			b',' => {
-				if user_input.is_empty() {
-					user_input = input();
-				}
-				tape[cell_index] = user_input.remove(0);
+				tape[cell_index] = input().remove(0);
 				icount += 1;
 			}
 			b'[' => {