在类中的struct [英] struct in class

问题描述

我在类中有struct，不知道如何从struct调用变量，请帮助;）

I have struct in class and not know how to call variables from struct, please help ;)

#include <iostream>
using namespace std;

class E
{
public: 
    struct X
    {
        int v;
    };
};

int main(){

E object;
object.v=10; //not work 

return 0;
}

推荐答案

> 类A 并不意味着类A 的实例自动具有属性 struct B 作为成员，也不意味着它自动具有作为成员的 struct B 的实例。

I declared class B inside class A, how do I access it?

Just because you declare your struct B inside class A does not mean that an instance of class A automatically has the properties of struct B as members, nor does it mean that it automatically has an instance of struct B as a member.

除了范围界定，两个类（ A 和 B ）之间没有真正的关系。

There is no true relation between the two classes (A and B), besides scoping.

struct A { 
  struct B { 
    int v;
  };  

  B inner_object;
};

int
main (int argc, char *argv[]) {
  A object;
    object.inner_object.v = 123;
}

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