Initial data commit

Task/Interactive-programming-repl-/Rust/interactive-programming-repl--3.rust

@@ -0,0 +1,17 @@
+#[macro_use]
+extern crate clap;
+use clap::App;
+fn main() {
+    let yaml = load_yaml!("cli.yaml");
+    let matches = App::from(yaml).get_matches();
+
+    let str1 = matches.value_of("STRING1").unwrap();
+    let str2 = matches.value_of("STRING2").unwrap();
+    let str3 = matches.value_of("SEPARATOR").unwrap();
+
+    println!("{:?}", f(&str1, &str2, &str3));
+}
+
+fn f<'a>(s1: &'a str, s2: &'a str, sep :&'a str) -> String{
+    [s1,sep,sep,s2].iter().map(|x| *x).collect()
+}