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C # stack (Stack)

C # set C # set

Stack (Stack)LIFO represents a collection of objects.When you need to perform the LIFO access, use the stack. When you add a list, called apush element when you remove the item from the list, called the popelement.

Stack methods and properties of the class

The following table lists some of the commonattributes Stackclass:

属性描述
Count获取 Stack 中包含的元素个数。

The following table lists some of the commonmethods Stackclass:

序号方法名 & 描述
1public virtual void Clear();
从 Stack 中移除所有的元素。
2public virtual bool Contains( object obj );
判断某个元素是否在 Stack 中。
3public virtual object Peek();
返回在 Stack 的顶部的对象，但不移除它。
4public virtual object Pop();
移除并返回在 Stack 的顶部的对象。
5public virtual void Push( object obj );
向 Stack 的顶部添加一个对象。
6public virtual object[] ToArray();
复制 Stack 到一个新的数组中。

Examples

The following example demonstrates the stack (Stack) Use: 

using System;
using System.Collections;

namespace CollectionsApplication
{
    class Program
    {
        static void Main (string [] args)
        {
            Stack st = new Stack ();

            st.Push ( 'A');
            st.Push ( 'M');
            st.Push ( 'G');
            st.Push ( 'W');
            
            Console.WriteLine ( "Current stack:");
            foreach (char c in st)
            {
                Console.Write (c + "");
            }
            Console.WriteLine ();
            
            st.Push ( 'V');
            st.Push ( 'H');
            Console.WriteLine ( "The next poppable value in stack: {0}", 
            st.Peek ());
            Console.WriteLine ( "Current stack:");           
            foreach (char c in st)
            {
               Console.Write (c + "");
            }
            Console.WriteLine ();

            Console.WriteLine ( "Removing values");
            st.Pop ();
            st.Pop ();
            st.Pop ();
            
            Console.WriteLine ( "Current stack:");
            foreach (char c in st)
            {
               Console.Write (c + ""); 
            }
        }
    }
}

When the above code is compiled and executed, it produces the following results: 

Current stack: 
WGMA
The next poppable value in stack: H
Current stack: 
HVWGMA
Removing values
Current stack: 
GMA

C # set C # set