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法学研究C# 中的 Stack.CopyTo() 方法
C# 中 Stack.CopyTo() 方法用于将堆栈复制到现有的单维阵列，从指定的数组索引开始。
语法
语法如下所示 −
public virtual void CopyTo (Array arr, int index);
上面，参数 arr 是从堆栈复制元素的目标单维数组，而索引是从该索引开始复制。
举例
下面我们来看一个示例 −
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("
Stack 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("
Stack elements...cloned");
foreach(int val in stack2){
Console.WriteLine(val);
}
Console.WriteLine("Count of elements (updated) = "+stack2.Count);
Console.WriteLine("
Copying 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
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
举例
下面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("
Stack 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("
Stack elements...cloned");
foreach(string val in stack2){
Console.WriteLine(val);
}
Console.WriteLine("Count of elements (updated) = "+stack2.Count);
Console.WriteLine("
Copying 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
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
更新于：03-12-2019
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