C# 中有没有像 C++ 一样的指针?安全吗? [英] Is there pointer in C# like C++? Is it safe?

问题描述

我正在编写一个使用树数据结构的应用程序.我已经用 C++ 编写了它，现在我想用 C# 编写它.我使用指针来实现树数据结构.C#中也有指针吗?使用它安全吗?

I'm writing an application that work with a tree data structure. I've written it with C++, now i want to write it by C#. I use pointers for implementing the tree data structure. Is there a pointer in C# too? Is it safe to use it?

推荐答案

如果您在 C#(或 Java，或许多其他语言)中实现树结构，您将使用引用而不是指针.注意.C++ 中的引用与这些引用不同.

If you're implementing a tree structure in C# (or Java, or many other languages) you'd use references instead of pointers. NB. references in C++ are not the same as these references.

用法大部分类似于指针，但有垃圾收集等优点.

The usage is similar to pointers for the most part, but there are advantages like garbage collection.

class TreeNode
{
    private TreeNode parent, firstChild, nextSibling;

    public InsertChild(TreeNode newChild)
    {
        newChild.parent = this;
        newChild.nextSibling = firstChild;
        firstChild = newChild;
    }
}

var root = new TreeNode();
var child1 = new TreeNode();
root.InsertChild(child1);

兴趣点:

• 声明成员时无需用*修改类型
• 无需在构造函数中将它们设置为 null(它们已经为 null)
• 没有特殊的 -> 成员访问运算符
• 无需编写析构函数(虽然查找IDisposable)

• No need to modify the type with * when declaring the members
• No need to set them to null in a constructor (they're already null)
• No special -> operator for member access
• No need to write a destructor (although look up IDisposable)

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