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/* *
* F i l e : s t a c k . s w i f t
* C r e a t e d T i m e : 2 0 2 3 - 0 1 - 0 9
* A u t h o r : n u o m i 1 ( n u o m i 1 @ q q . c o m )
*/
@ main
enum Stack {
/* D r i v e r C o d e */
static func main ( ) {
/* 初 始 化 堆 疊 */
// S w i f t 沒 有 內 建 的 堆 疊 類 別 ， 可 以 把 A r r a y 當 作 堆 疊 來 使 用
var stack : [ Int ] = [ ]
/* 元 素 入 堆 疊 */
stack . append ( 1 )
stack . append ( 3 )
stack . append ( 2 )
stack . append ( 5 )
stack . append ( 4 )
print ( " 堆疊 stack = \( stack ) " )
/* 訪 問 堆 疊 頂 元 素 */
let peek = stack . last !
print ( " 堆疊頂元素 peek = \( peek ) " )
/* 元 素 出 堆 疊 */
let pop = stack . removeLast ( )
print ( " 出堆疊元素 pop = \( pop ) ，出堆疊後 stack = \( stack ) " )
/* 獲 取 堆 疊 的 長 度 */
let size = stack . count
print ( " 堆疊的長度 size = \( size ) " )
/* 判 斷 是 否 為 空 */
let isEmpty = stack . isEmpty
print ( " 堆疊是否為空 = \( isEmpty ) " )
}
}
