c++ - 如何指向指向类实例的指针数组？

Question

我有一个指针数组

myclass* myclass_instances[100];

myclass_instances[i] = new myclass(...);

现在我有另一个class udp_networking. 在这个类的方法中，我想在这些myclass_instances对象上调用一些方法。

我应该如何在其中声明一个成员，我 class udp_networking应该如何初始化它，它指向相同的实例？

Answer 1

这应该这样做：

class udp_networking {

    myclass* (*ptr_to_array)[100]; // declare a pointer to an array of 100 myclass*

    explicit udp_networking( myclass* (*ptr)[100] )
        : ptr_to_array(ptr) { }
         // initialize it in constructor
};

用法：

my_class* instances[100] = { /* ... */ };
upd_networking u( instances );

但这是一种非常 C'ish 的处理方式。我会考虑std::vector或std::array为此。

Answer 2

myclass* pointer; // this would be a pointer or an array. The difference
                  // is how you use it. Make shure you keep
                  // that difference in mind while programming

myclass** array_of_pointers; // this would be an array of pointers to myclass
                             // might also be an array of arrays.
                             // or an pointer to an array

myclass*** pointer_to_array_of_pointers; // this would be a pointer to an array of pointers
                                         // or an array of arrays of arrays.
                                         // or an array of arrays of pointers.
                                         // or an array of pointers of arrays
                                         // ...