#[cfg(feature = "hello")]
pub fn say_hello(name: &str) -> String {
format!("Hello, {}", name)
}
#[cfg(feature = "bye")]
pub fn say_goodbye(name: &str) -> String {
format!("Goodbye, {}", name)
}
#[cfg(feature = "hello")]
pub fn say_hello_world() -> String {
"Hello World".to_string()
}