progress variables

exercises/02_functions/functions1.rs

@@ -1,4 +1,7 @@
 // TODO: Add some function with the name `call_me` without arguments or a return value.
+fn call_me() {
+
+}
 
 fn main() {
     call_me(); // Don't change this line

exercises/02_functions/functions2.rs

@@ -1,5 +1,5 @@
 // TODO: Add the missing type of the argument `num` after the colon `:`.
-fn call_me(num:) {
+fn call_me(num:i32) {
     for i in 0..num {
         println!("Ring! Call number {}", i + 1);
     }

exercises/02_functions/functions3.rs

@@ -6,5 +6,5 @@ fn call_me(num: u8) {
 
 fn main() {
     // TODO: Fix the function call.
-    call_me();
+    call_me(32);
 }