#[cfg(feature = "hello")]
pub fn say_hello(name: &str) -> String {
format!("hello {}", name)
}
#[cfg(feature = "hello")]
pub fn say_goodbye(name: &str) -> String {
format!("goodbye {}", name)
}
#[cfg(feature = "bye")]
pub fn say_hello_cok(name: &str) -> String {
format!("jancok {}", name)
}