C# |检查堆栈是否包含元素
原文:https://www . geesforgeks . org/c-sharp-check-if-a-stack-contain-a-element/
栈 代表一个 后进先出 的集合对象。 堆叠< T >。Contains(Object)方法用于检查堆栈中是否有元素< T >。
语法:
public virtual bool Contains(object obj);
返回值:如果元素存在于堆栈中,函数返回真如果元素不存在于堆栈中,函数返回假。
下面给出了一些例子,以便更好地理解实现:
例 1:
// C# code to Check if a Stack
// contains an element
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("Geeks");
myStack.Push("Geeks Classes");
myStack.Push("Noida");
myStack.Push("Data Structures");
myStack.Push("GeeksforGeeks");
// Checking whether the element is
// present in the Stack or not
// The function returns True if the
// element is present in the Stack, else
// returns False
Console.WriteLine(myStack.Contains("GeeksforGeeks"));
}
}
Output:
True
例 2:
// C# code to Check if a Stack
// contains an element
using System;
using System.Collections.Generic;
class GFG {
// Driver code
public static void Main()
{
// Creating a Stack of Integers
Stack<int> myStack = new Stack<int>();
// Inserting the elements into the Stack
myStack.Push(5);
myStack.Push(10);
myStack.Push(15);
myStack.Push(20);
myStack.Push(25);
// Checking whether the element is
// present in the Stack or not
// The function returns True if the
// element is present in the Stack, else
// returns False
Console.WriteLine(myStack.Contains(7));
}
}
Output:
False
参考:
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