C#中的Stack.CopyTo()方法
C#中的Stack.CopyTo()方法用于从指定的数组索引处开始，将Stack复制到现有的一维数组。
语法
语法如下-
public virtual void CopyTo (Array arr, int index);
上面的参数arr是一维数组，它是从Stack复制的元素的目的地，而index是复制开始的索引。
示例
现在让我们看一个例子-
using System;
using System.Collections;
public class Demo {
public static void Main(){
Stack stack = new Stack();
stack.Push(150);
stack.Push(300);
stack.Push(500);
stack.Push(750);
stack.Push(1000);
stack.Push(1250);
stack.Push(1500);
stack.Push(2000);
stack.Push(2500);
Console.WriteLine("Stack elements...");
foreach(int val in stack){
Console.WriteLine(val);
}
Console.WriteLine("Count of elements = "+stack.Count);
Console.WriteLine("Element 750 is the stack? = "+stack.Contains(750));
stack.Push(3000);
Console.WriteLine("\nStack elements...updated");
foreach(int val in stack)
{
Console.WriteLine(val);
}
Console.WriteLine("Count of elements (updated) = "+stack.Count);
Console.WriteLine("Element 5000 is the stack? = "+stack.Contains(5000));
Stack stack2 = (Stack)stack.Clone();
Console.WriteLine("\nStack elements...cloned");
foreach(int val in stack2){
Console.WriteLine(val);
}
Console.WriteLine("Count of elements (updated) = "+stack2.Count);
Console.WriteLine("\nCopying the cloned stack to an integer array...");
int[] intArr = new int[stack2.Count];
stack2.CopyTo(intArr, 0);
foreach(int j in intArr){
Console.WriteLine(j);
}
}
}输出结果
这将产生以下输出-
Stack elements... 2500 2000 1500 1250 1000 750 500 300 150 Count of elements = 9 Element 750 is the stack? = True Stack elements...updated 3000 2500 2000 1500 1250 1000 750 500 300 150 Count of elements (updated) = 10 Element 5000 is the stack? = False Stack elements...cloned 3000 2500 2000 1500 1250 1000 750 500 300 150 Count of elements (updated) = 10 Copying the cloned stack to an integer array... 3000 2500 2000 1500 1250 1000 750 500 300 150
示例
现在让我们来看另一个示例-
using System;
using System.Collections;
public class Demo {
public static void Main(){
Stack stack = new Stack();
stack.Push("Projectors");
stack.Push("Monitors");
stack.Push("XPS");
stack.Push("Laptop");
stack.Push("Notebook");
Console.WriteLine("Stack elements...");
foreach(string val in stack){
Console.WriteLine(val);
}
Console.WriteLine("Count of elements = "+stack.Count);
Console.WriteLine("Element XPS is the stack? = "+stack.Contains("XPS"));
stack.Push("Ultrabook");
Console.WriteLine("\nStack elements...updated");
foreach(string val in stack){
Console.WriteLine(val);
}
Console.WriteLine("Count of elements (updated) = "+stack.Count);
Console.WriteLine("Element Ultrabook is the stack? = "+stack.Contains("Ultrabook"));
Stack stack2 = (Stack)stack.Clone();
Console.WriteLine("\nStack elements...cloned");
foreach(string val in stack2){
Console.WriteLine(val);
}
Console.WriteLine("Count of elements (updated) = "+stack2.Count);
Console.WriteLine("\nCopying the cloned stack to a string array...");
string[] strArr = new string[stack2.Count];
stack2.CopyTo(strArr, 0);
foreach(string j in strArr){
Console.WriteLine(j);
}
}
}输出结果
这将产生以下输出-
Stack elements... Notebook Laptop XPS Monitors Projectors Count of elements = 5 Element XPS is the stack? = True Stack elements...updated Ultrabook Notebook Laptop XPS Monitors Projectors Count of elements (updated) = 6 Element Ultrabook is the stack? = True Stack elements...cloned Ultrabook Notebook Laptop XPS Monitors Projectors Count of elements (updated) = 6 Copying the cloned stack to a string array... Ultrabook Notebook Laptop XPS Monitors Projectors