更改第二个变量时，自动更改第一个变量.如何? [英] Change first variable automatically, when second is changed. How?

问题描述

我们有诸如ref和out之类的选项.
我想做下一个:

int a = 5;
int b = a;
a = 10;
b应更改为等于10.

那么，怎么办呢?

We have such options like ref and out.
I wanna do like next:

int a = 5;
int b = a;
a = 10;
b should change to equal 10.

So, how?

推荐答案

您可以创建一个属性:

You can create a property:

int _a;
int a
{
    get
    {
        return _a;
    }
    set
    {
        _a = value;
        _b = value;
    }
}

int _b;
int b
{
    get
    {
        return _b;
    }
    set
    {
        _b = value;
    }
}

这些属性应在类内部创建，但应在方法外部创建.

这是做什么的?当您想要获取a的值时，getter将返回该字段_a.当您想要设置a的值时，设置器将同时更改_a和_b的值，并且_b由b的获取器返回.
在此处阅读有关属性的更多信息:
MSDN-属性(C#编程指南) [

These properties should be created inside a class, but outside a method.

What does this do? When you want to get the value of a, the getter will return _a, the field. When you want to set the value of a, the setter will change the value of both _a and _b, and _b is returned by the getter of b.

Read more about properties here:
MSDN - Properties (C# Programming Guide)[^]

您可以使用指针.

You could use pointers.

static void Main(string[] args)
      {

          unsafe
          {
              int a = 5;
              int* b = &a;

              a = 10;

              Console.WriteLine("a = {0}, b = {1}", a, *b);
              Console.ReadLine();
          }

      }

Ref，

1)原始值的更改未反映在可变的引用类型中

Ref,

1) Original Values changes are not reflecting in reference types varaiable

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