diff --git a/src/main.rs b/src/main.rs
index 4dc19ec..614c0c6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -149,14 +149,44 @@ impl Program {
         let contents = fs::read_to_string(filename).expect("Something went wrong reading the file");
         let mut prog = Program::from_string(contents);
         prog.run();
-        
-        for (key, value) in prog.vars.iter() {
-            self.vars.insert(*key, value.to_string());
-        }
 
-        for (key, value) in prog.funcs.iter() {
-            self.funcs.insert(*key, value.to_string());
+        if argument_vec.len() > 1 {
+            for name in argument_vec[1..].iter() {
+                let kind = name.chars().nth(0).unwrap();
+                let name_to_import = name.chars().nth(1).unwrap();
+                if kind == 'v' {
+                    let key = prog.vars.get(&name_to_import);
+                    match key {
+                        Some(value) => self.vars.insert(name_to_import, value.to_string()),
+                        None => panic!("ValueError: variable {} has not been defined in {}!", name_to_import, filename)
+                    };
+                } else if kind == 'f' {
+                    let key = prog.funcs.get(&name_to_import);
+                    match key {
+                        Some(value) => {self.funcs.insert(name_to_import, value.to_string());()},
+                        None => panic!("ValueError: function {} has not been defined in {}!", name_to_import, filename)
+                    }
+                } else {
+                    continue;
+                }
+            }
+        } else {
+            // implied catch-all
+            for (key, value) in prog.vars.iter() {
+                self.vars.insert(*key, value.to_string());
+            }
+
+            for (key, value) in prog.funcs.iter() {
+                self.funcs.insert(*key, value.to_string());
+            }
         }
+        // for (key, value) in prog.vars.iter() {
+        //     self.vars.insert(*key, value.to_string());
+        // }
+
+        // for (key, value) in prog.funcs.iter() {
+        //     self.funcs.insert(*key, value.to_string());
+        // }
     }
 
     fn parse(&mut self, instruction: &String) {