叠加。C# 中的 Pop()方法
原文:https://www.geeksforgeeks.org/stack-pop-method-in-c-sharp/
该方法(属于系统。集合命名空间)用于移除并返回堆栈顶部的对象。此方法类似于 Peek 方法，但 Peek 不会修改堆栈。
语法:
public virtual object Pop ();
返回值:返回从栈顶移除的对象。
异常:如果堆栈为空，该方法将给出无效操作异常。
以下程序说明了上述方法的使用:
例 1:
// C# Program to illustrate the
// use of Stack.Pop() Method
using System;
using System.Collections;
class GFG {
// Main Method
public static void Main()
{
// Creating a Stack
Stack myStack = new Stack();
// Inserting the elements into the Stack
myStack.Push("Geeks");
myStack.Push("Geeks Classes");
myStack.Push("Noida");
myStack.Push("Data Structures");
myStack.Push("GeeksforGeeks");
Console.WriteLine("Number of elements in the Stack: {0}",
myStack.Count);
// Retrieveing top element of Stack
Console.Write("Top element of Stack is: ");
Console.Write(myStack.Pop());
// printing the no of Stack element
// after Pop operation
Console.WriteLine("\nNumber of elements in the Stack: {0}",
myStack.Count);
}
}
Output:
Number of elements in the Stack: 5
Top element of Stack is: GeeksforGeeks
Number of elements in the Stack: 4
例 2:
// C# Program to illustrate the
// use of Stack.Pop() Method
using System;
using System.Collections;
class GFG {
// Main Method
public static void Main()
{
// Creating a Stack
Stack myStack = new Stack();
// Inserting the elements into the Stack
myStack.Push(7);
myStack.Push(9);
Console.WriteLine("Number of elements in the Stack: {0}",
myStack.Count);
// Retrieveing top element of Stack
Console.Write("Top element of Stack is: ");
Console.Write(myStack.Pop());
// printing the no of Stack element
// after Pop operation
Console.WriteLine("\nNumber of elements in the Stack: {0}",
myStack.Count);
}
}
Output:
Number of elements in the Stack: 2
Top element of Stack is: 9
Number of elements in the Stack: 1
参考:
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