rust_crates_mcnwr/
lib.rs

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pub fn add(left: u64, right: u64) -> u64 {
    left + right
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn it_works() {
        let result = add(2, 2);
        assert_eq!(result, 4);
    }
}

pub fn say_hello(name: &str) -> String {
    format!("Hello, {}", name)
}

pub fn say_goodbye(name: &str) -> String {
    format!("Goodbye, {}", name)
}

pub fn say_hello_to_everyone() -> String {
    "Hello everyone".to_string()
}

pub fn say_goodbye_to_everyone() -> String {
    "Goodbye everyone".to_string()
}