Add solutions to functions

1 files changed, 10 insertions, 9 deletions

diff --git a/exercises/02_functions/functions4.rs b/exercises/02_functions/functions4.rs
index 06d3b1b..b22bffd 100644
--- a/exercises/02_functions/functions4.rs
+++ b/exercises/02_functions/functions4.rs
@@ -1,14 +1,14 @@
 // This store is having a sale where if the price is an even number, you get 10
-// Rustbucks off, but if it's an odd number, it's 3 Rustbucks off. (Don't worry
-// about the function bodies themselves, we're only interested in the signatures
-// for now. If anything, this is a good way to peek ahead to future exercises!)
+// Rustbucks off, but if it's an odd number, it's 3 Rustbucks off.
+// Don't worry about the function bodies themselves, we are only interested in
+// the signatures for now.
 
-fn main() {
-    let original_price = 51;
-    println!("Your sale price is {}", sale_price(original_price));
+fn is_even(num: i64) -> bool {
+    num % 2 == 0
 }
 
-fn sale_price(price: i32) -> {
+// TODO: Fix the function signature.
+fn sale_price(price: i64) -> {
     if is_even(price) {
         price - 10
     } else {
@@ -16,6 +16,7 @@ fn sale_price(price: i32) -> {
     }
 }
 
-fn is_even(num: i32) -> bool {
-    num % 2 == 0
+fn main() {
+    let original_price = 51;
+    println!("Your sale price is {}", sale_price(original_price));
 }