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57 lines
1.5 KiB
57 lines
1.5 KiB
/*
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* File: linear_search.rs
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* Created Time: 2023-07-09
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* Author: codingonion (coderonion@gmail.com)
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*/
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include!("../include/include.rs");
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use list_node::ListNode;
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use std::cell::RefCell;
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use std::rc::Rc;
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/* 線性查詢（陣列） */
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fn linear_search_array(nums: &[i32], target: i32) -> i32 {
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// 走訪陣列
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for (i, num) in nums.iter().enumerate() {
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// 找到目標元素，返回其索引
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if num == &target {
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return i as i32;
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}
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}
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// 未找到目標元素，返回 -1
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return -1;
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}
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/* 線性查詢（鏈結串列） */
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fn linear_search_linked_list(
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head: Rc<RefCell<ListNode<i32>>>,
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target: i32,
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) -> Option<Rc<RefCell<ListNode<i32>>>> {
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// 找到目標節點，返回之
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if head.borrow().val == target {
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return Some(head);
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};
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// 找到目標節點，返回之
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if let Some(node) = &head.borrow_mut().next {
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return linear_search_linked_list(node.clone(), target);
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}
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// 未找到目標節點，返回 None
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return None;
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}
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/* Driver Code */
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pub fn main() {
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let target = 3;
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/* 在陣列中執行線性查詢 */
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let nums = [1, 5, 3, 2, 4, 7, 5, 9, 10, 8];
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let index = linear_search_array(&nums, target);
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println!("目標元素 3 的索引 = {}", index);
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/* 在鏈結串列中執行線性查詢 */
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let head = ListNode::arr_to_linked_list(&nums);
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let node = linear_search_linked_list(head.unwrap(), target);
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println!("目標節點值 3 的對應節點物件為 {:?}", node);
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}
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