变量的默认类型。访问修饰符我的意思是。 [英] Default type of a variable. Access Modifiers I mean.

问题描述

我的问题很简单但我无法帮助我的好奇心。有谁知道C＃中变量的默认类型是什么（或更常见的是OOPS）

My Question is rather Simple but I just can't help my curiosity. Does anyone know what is the default type of a variable in C# (or more generally in OOPS)

String st = "Hello";

这个

What is the type (Access Modifiers) of this

String st 

的类型（访问修饰符）是什么。



请为您的答案提供合适的参考。我试图谷歌它，但nothig具体给出了变量的TYPE。有人说它的公众别人说是私人的。



谢谢......

here.

Please provide suitable refrences for your answer. I tried to google it but nothig is specificly given about the TYPE of a variable. Some say its public others say private.

Thanks...

推荐答案

你混淆了两个这里有不同的条款。

1）类型

2）访问修饰符



类型String st;是 System.String 。



默认访问修饰符变量/对象是私有的。

You are mixing up two different terms here.
1) Type
2) Access Modifier

Type of "String st;" is System.String.

Default access modifier of variable/object is private.

public& private不是一种变量..

它指定成员变量的访问级别的关键字。 看到这个



你的答案是（访问）成员变量的级别）：私人



试试这个例子......

public & private is not a type of variable..
it keywords to specify access levels for member variables. See This

And Your Answer is (access levels for member variables): Private

Let test this example...

class Test
    {
        String Test1;
        public string Test2;
        protected string Test3;
        private string Test4;
    }

    class TestAccessLavel
    {
        static void Main()
        {
            Test e = new Test();
            // e.Test1 Not acessable
            String Test2 = e.Test2;
            //e.Test3 Not acessable
            //e.Test4 Not acessable
        }
    }

创建一个类测试并创建变量（见上文）

现在在其他类main（）创建Test对象并尝试访问变量..



如果Test1& Test2是可以接受的 - 公共

Test1& Test3是可以接受的 - 受保护的

Test1& Test4是可以访问的 - 私人的



谢谢

Create one class Test and create variable (see above)
Now in other class main() create object of Test and try to acess Variable..

If Test1 & Test2 is acessable - public
Test1 & Test3 is acessable - protected
Test1 & Test4 is acessable - private

Thanks

在大多数情况下，默认访问是私人，包括您询问的类型的字段声明。



顶级类，结构或接口的默认访问权限，即在此示例中

In most cases the default access is private, including field declarations of the type you ask about.

The default access for a top level class, struct or interface, i.e. as in this example

namespace Test {
 class NoAccessModifier { }
}

... internal 。但请注意，嵌套类/ struct /接口（即在另一个类中声明的接口）的默认访问权限是私有的，就像在类中定义的字段，方法等一样。）

... is internal. Note however that the default access for a nested class/struct/interface (i.e. one which is declared inside another class) is private, just like fields, methods etc defined inside a class).

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