new programm for password generation

match.rs

@@ -0,0 +1,67 @@
+// match
+// 
+
+
+// main function
+fn main() { 
+    let x = 2;
+    let a = 1;
+    
+    match a {
+        b => println!("a: {} b: {}", a, b), // catches '_' 'any case'
+    }
+    
+    match x { // more powerful than if/else
+        1 => println!("one"), // 
+        2 => println!("two"),
+        3 => println!("three"),
+        4 => println!("four"),
+        _ => println!("something else"), // ‘exhaustiveness checking’ -> error if not used
+    }
+
+    let number = match x { // use match for variable bindings
+        1 => "one", // integer converted into string
+        2 => "two",
+        3 => "three",
+        4 => "four",
+        5 => "five",
+        _ => "something else",
+    };
+    
+    println!("number is: {}", number);
+
+    struct Point {
+        x: i32,
+        y: i32,
+    }
+    
+    let origin = Point { x: 0, y: 0 }
+
+    match origin { // deconstruct compound data type
+        Point { x, y } => println!("({},{})", x, y),
+    }
+
+}
+
+// enmus
+enum Message {
+    Quit,
+    ChangeColor(i32, i32, i32), // tulpe
+    Move { x: i32, y: i32 }, // struct
+    Write(String),
+}
+
+// funtions
+fn quit() { /* ... */ }
+fn change_color(r: i32, g: i32, b: i32) { /* ... */ }
+fn move_cursor(x: i32, y: i32) { /* ... */ }
+
+// process possible variants of enum with match
+fn process_message(msg: Message) {
+    match msg {
+        Message::Quit => quit(),
+        Message::ChangeColor(r, g, b) => change_color(r, g, b),
+        Message::Move { x, y: new_name_for_y } => move_cursor(x, new_name_for_y),
+        Message::Write(s) => println!("{}", s),
+    };
+}