function with generic parameters

src/main.rs

@@ -1,24 +1,13 @@
 fn main() {
-    let mut rect = Rectangle {
-        width: 10,
-        height: 5,
-    };
-    println!("old area: {}", rect.area());
-    rect.inc_width(5);
-    println!("new area: {}", rect.area());
+    println!("coin toss: {}", pick_one("heads", "tails"));
+    println!("cash prize: {}", pick_one(500, 1000));
+    println!("cash prize: {}", pick_one(5.0, 1000));
 }
 
-struct Rectangle {
-    width: u32,
-    height: u32,
-}
-
-impl Rectangle {
-    fn area(&self) -> u32 {
-        return self.width * self.height;
-    }
-
-    fn inc_width(&mut self, delta: u32) {
-        self.width += delta;
+fn pick_one<T>(a: T, b: T) -> T {
+    if std::process::id() % 2 == 0 {
+        return a
+    } else {
+        return b
     }
 }