rain_example_crate/lib.rs
//! # My Crate
//! `rain_example_crate` 收集了一般的通用计算函数
//!
//! `rain_example_crate` is a collection of utilities to make performing certain calculations more convenient.
/// 给定的数字加1
///
/// # Examples
///
/// ```
/// let arg = 5;
/// let answer = rain_example_crate::add_one(arg);
///
/// assert_eq!(answer, 6);
///
pub fn add_one(x: i32) -> i32 {
x + 1
}