C++根据父指针删除子项

#include <iostream>

struct Child {
    int data;
    Child* next;
};

struct Parent {
    int id;
    Child* child;
};

void deleteChild(Parent* parent, int childData) {
    Child* current = parent->child;
    Child* previous = nullptr;

    while (current != nullptr) {
        if (current->data == childData) {
            if (previous == nullptr) {
                parent->child = current->next;
            } else {
                previous->next = current->next;
            }
            delete current;
            return;
        }
        previous = current;
        current = current->next;
    }
}

int main() {
    Parent parent;
    parent.id = 1;

    Child* child1 = new Child;
    child1->data = 10;

    Child* child2 = new Child;
    child2->data = 20;

    parent.child = child1;
    child1->next = child2;
    child2->next = nullptr;

    deleteChild(&parent, 20);

    Child* current = parent.child;
    while (current != nullptr) {
        std::cout << current->data << " ";
        current = current->next;
    }

    return 0;
}