C# |在栈顶插入一个对象–推送操作
栈 代表一个 后进先出 的集合对象。当您需要后进先出访问项目时，可以使用它。当您在列表中添加一个项目时，它被称为推动项目，当您移除它时，它被称为弹出项目。堆叠< T >。推(T) 方法用于在堆栈顶部插入一个对象< T >。
属性:
- 堆栈的容量是堆栈可以容纳的元素数量。当元素被添加到堆栈中时，容量会根据需要通过重新分配自动增加。
- 如果计数小于堆栈的容量，则推送是一个 0(1)操作。如果需要增加容量来容纳新元素，Push 将变成 O(n)操作，其中 n 是 Count。Pop 是一个 O(1)操作。
- 堆栈接受 null 作为有效值，并允许重复元素。
语法:
void Push(object obj);
示例:
// C# code to insert an object
// at the top of the Stack
using System;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Creating a Stack of strings
Stack<string> myStack = new Stack<string>();
// Inserting the elements into the Stack
myStack.Push("one");
// Displaying the count of elements
// contained in the Stack
Console.Write("Total number of elements in the Stack are : ");
Console.WriteLine(myStack.Count);
myStack.Push("two");
// Displaying the count of elements
// contained in the Stack
Console.Write("Total number of elements in the Stack are : ");
Console.WriteLine(myStack.Count);
myStack.Push("three");
// Displaying the count of elements
// contained in the Stack
Console.Write("Total number of elements in the Stack are : ");
Console.WriteLine(myStack.Count);
myStack.Push("four");
// Displaying the count of elements
// contained in the Stack
Console.Write("Total number of elements in the Stack are : ");
Console.WriteLine(myStack.Count);
myStack.Push("five");
// Displaying the count of elements
// contained in the Stack
Console.Write("Total number of elements in the Stack are : ");
Console.WriteLine(myStack.Count);
myStack.Push("six");
// Displaying the count of elements
// contained in the Stack
Console.Write("Total number of elements in the Stack are : ");
Console.WriteLine(myStack.Count);
}
}
Output:
Total number of elements in the Stack are : 1
Total number of elements in the Stack are : 2
Total number of elements in the Stack are : 3
Total number of elements in the Stack are : 4
Total number of elements in the Stack are : 5
Total number of elements in the Stack are : 6
参考:
版权属于：月萌API www.moonapi.com，转载请注明出处
