hello-algo/codes/rust/chapter_searching/linear_search.rs
codingonion 7ffef7e1d6
update the author info sjinzh -> codingonion (#1017)
* update author information

* Update index.md

---------

Co-authored-by: Yudong Jin <krahets@163.com>
2024-01-02 01:25:37 +08:00

51 lines
1.5 KiB
Rust

/*
* File: linear_search.rs
* Created Time: 2023-07-09
* Author: codingonion (coderonion@gmail.com)
*/
include!("../include/include.rs");
use std::rc::Rc;
use std::cell::RefCell;
use list_node::ListNode;
/* 线性查找(数组) */
fn linear_search_array(nums: &[i32], target: i32) -> i32 {
// 遍历数组
for (i, num) in nums.iter().enumerate() {
// 找到目标元素,返回其索引
if num == &target {
return i as i32;
}
}
// 未找到目标元素,返回 -1
return -1;
}
/* 线性查找(链表) */
fn linear_search_linked_list(head: Rc<RefCell<ListNode<i32>>>, target: i32) -> Option<Rc<RefCell<ListNode<i32>>>> {
// 找到目标节点,返回之
if head.borrow().val == target {return Some(head)};
// 找到目标节点,返回之
if let Some(node) = &head.borrow_mut().next {
return linear_search_linked_list(node.clone(), target);
}
// 未找到目标节点,返回 None
return None;
}
/* Driver Code */
pub fn main() {
let target = 3;
/* 在数组中执行线性查找 */
let nums = [ 1, 5, 3, 2, 4, 7, 5, 9, 10, 8 ];
let index = linear_search_array(&nums, target);
println!("目标元素 3 的索引 = {}", index);
/* 在链表中执行线性查找 */
let head = ListNode::arr_to_linked_list(&nums);
let node = linear_search_linked_list(head.unwrap(), target);
println!("目标节点值 3 的对应节点对象为 {:?}", node);
}