Added filename to top of .rs files

primitive_types/primitive_types1.rs

@@ -1,3 +1,4 @@
+// primitive_types1.rs
 // Fill in the rest of the line that has code missing!
 // No hints, there's no tricks, just get used to typing these :)
 

primitive_types/primitive_types2.rs

@@ -1,3 +1,4 @@
+// primitive_types2.rs
 // Fill in the rest of the line that has code missing!
 // No hints, there's no tricks, just get used to typing these :)
 

primitive_types/primitive_types3.rs

@@ -1,3 +1,4 @@
+// primitive_types3.rs
 // Create an array with at least 100 elements in it where the ??? is. 
 // Scroll down for hints!
 

primitive_types/primitive_types4.rs

@@ -1,3 +1,4 @@
+// primitive_types4.rs
 // Get a slice out of Array a where the ??? is so that the `if` statement
 // returns true. Scroll down for hints!!
 

primitive_types/primitive_types5.rs

@@ -1,3 +1,4 @@
+// primitive_types5.rs
 // Destructure the `cat` tuple so that the println will work.
 // Scroll down for hints!
 

primitive_types/primitive_types6.rs

@@ -1,3 +1,4 @@
+// primitive_types6.rs
 // Use a tuple index to access the second element of `numbers`.
 // You can put this right into the `println!` where the ??? is.
 // Scroll down for hints!