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39 lines
958 B
Swift
39 lines
958 B
Swift
/**
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* File: stack.swift
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* Created Time: 2023-01-09
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* Author: nuomi1 (nuomi1@qq.com)
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*/
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@main
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enum Stack {
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/* Driver Code */
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static func main() {
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/* 初始化栈 */
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// Swift 没有内置的栈类，可以把 Array 当作栈来使用
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var stack: [Int] = []
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/* 元素入栈 */
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stack.append(1)
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stack.append(3)
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stack.append(2)
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stack.append(5)
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stack.append(4)
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print("栈 stack = \(stack)")
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/* 访问栈顶元素 */
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let peek = stack.last!
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print("栈顶元素 peek = \(peek)")
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/* 元素出栈 */
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let pop = stack.removeLast()
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print("出栈元素 pop = \(pop)，出栈后 stack = \(stack)")
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/* 获取栈的长度 */
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let size = stack.count
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print("栈的长度 size = \(size)")
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/* 判断是否为空 */
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let isEmpty = stack.isEmpty
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print("栈是否为空 = \(isEmpty)")
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}
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}
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