Add ability for reading variables

src/main.rs

@@ -9,7 +9,7 @@ mod eval;
 struct Program {
     data: Vec<String>,
     pc: usize,
-    vars: HashMap<char, String>
+    vars: HashMap<char, char>
 }
 
 impl Program {
@@ -32,22 +32,21 @@ impl Program {
         let mut deconstructed: Vec<char> = arguments.chars().collect();
 
         for (index, char) in arguments.chars().enumerate() {
-            if char == 'e' {
+            let value = self.vars.get(&char);
-                deconstructed[index] = 'f';
+
+            match value {
+                Some(content) => deconstructed[index] = *content,
+                None => {}
             }
         }
 
-        println!("{:?}", self.vars);
         deconstructed.into_iter().collect()
     }
 
     fn add_var(&mut self, arguments: &str) {
-        let name = arguments.chars().collect::<Vec<char>>()[0];
+        let argument_vec: Vec<char> = arguments.chars().collect();
-        let old_value = &arguments[1..];
 
-        let value = old_value.to_owned();
+        self.vars.insert(argument_vec[0], argument_vec[1]);
-
-        self.vars.insert(name, value);
     }
 
     fn eval(&mut self, instruction: &String) {
@@ -84,7 +83,6 @@ impl fmt::Display for Program {
 }
 
 fn main() {
-
     let args: Vec<String> = env::args().collect();
     if args.len() == 1 {
         panic!("You must provide an argument!");