点运算符和范围解析运算符之间的区别 [英] whats the difference between dot operator and scope resolution operator

问题描述

我只是想知道之间的区别。 c>。

I just wanted to know the difference between . operator and :: operator?

）用于访问对象的成员，后者（双冒号， :: ）用于访问命名空间或类的成员。

The former (dot, .) is used to access members of an object, the latter (double colon, ::) is used to access members of a namespace or a class.

请考虑以下设置。

namespace ns {
    struct type
    {
        int var;
    };
}

在这种情况下，要引用结构命名空间，则使用 :: 。要访问类型类型的对象中的变量，请使用。。

In this case, to refer to the structure, which is a member of a namespace, you use ::. To access the variable in an object of type type, you use ..

ns::type obj;
obj.var = 1;

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