c++-如何从一个类访问其他类结构

我是一个初学者，正在努力学习编码。如果我的问题很愚蠢，请原谅。我有这两个类，我希望类存储可以访问来自struct Stock in class Toys的数据。我不知道该怎么做？

#include 
#include 
#include 

class Toys {
public:
    struct Stock
    {
        int x;
        Stock(int value)
            :x(value) {}
    };
};

class Store {
public:
    Toys myToy(int count) {
        _count = count;
    }
    Toys* myStore;
    //What do I need to do to bind a struct Stock from class Toy here?
private:
    int _count;
};

int main()
{
    Store myStore;
    int x;
    std::vector stocks;
    std::cout << "Enter the availability for Water Gun.\n";
    std::cin >> x;
    for (int i = 0; i <= x; i++) {
        stocks.push_back(i);
        std::cout << stocks[i].x << std::endl;
    }
//Later I want to pull vector stocks from class Store here.
    return 0;
}