Added some methods.

hw6/task1/src/main.rs

@@ -2,10 +2,14 @@ fn main() {
     println!("Hello, world!");
 }
 
-fn concatenate_strings(){
+/// Concats the two given String *references* and returns them as a String.
+fn concatenate_strings<'a>(s1:&'a str, s2:&'a str) -> String {
+    s1.to_string() + s2
 }
 
-fn split_into_strings(){
+/// Splits the given String *reference* and returns it as Vector of Strings.
+fn split_into_strings<'a>(s1:&'a str) -> Vec<String> {
+    s1.to_string().split_whitespace().collect()
 }
 
 fn sum_strings(){