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14c314c08c
* Retranslate the complete English edition from Simplified Chinese * Polish three English explanations after reader-focused review
50 lines
1.5 KiB
Rust
50 lines
1.5 KiB
Rust
/*
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* File: deque.rs
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* Created Time: 2023-02-05
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* Author: codingonion (coderonion@gmail.com), xBLACKICEx (xBLACKICEx@outlook.com)
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*/
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use hello_algo_rust::include::print_util;
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use std::collections::VecDeque;
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/* Driver code */
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pub fn main() {
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// Initialize the deque
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let mut deque: VecDeque<i32> = VecDeque::new();
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deque.push_back(3);
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deque.push_back(2);
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deque.push_back(5);
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print!("Deque deque = ");
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print_util::print_queue(&deque);
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// Access an element
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let peek_first = deque.front().unwrap();
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print!("\nFront element peek_first = {peek_first}");
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let peek_last = deque.back().unwrap();
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print!("\nRear element peek_last = {peek_last}");
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/* Enqueue elements */
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deque.push_back(4);
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print!("\nAfter enqueuing element 4 at the rear, deque = ");
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print_util::print_queue(&deque);
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deque.push_front(1);
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print!("\nAfter enqueuing element 1 at the front, deque = ");
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print_util::print_queue(&deque);
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// Dequeue an element
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let pop_last = deque.pop_back().unwrap();
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print!("\nElement removed from the rear = {pop_last}; after removal, deque = ");
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print_util::print_queue(&deque);
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let pop_first = deque.pop_front().unwrap();
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print!("\nElement removed from the front = {pop_first}; after removal, deque = ");
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print_util::print_queue(&deque);
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// Get the deque size
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let size = deque.len();
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print!("\nDeque size = {size}");
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// Check whether the deque is empty
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let is_empty = deque.is_empty();
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print!("\nIs the deque empty? {is_empty}");
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}
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