rain_example_crate/
lib.rs

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//! # 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
}