迭代通过指针的向量 [英] Iterating through a vector of pointers

问题描述

我试图重复通过玩家手牌。

I'm trying to iterate through a Players hand of cards.

Player.cpp

vector<Card*>::iterator iter;
    for(iter = current_cards.begin(); iter != current_cards.end(); iter++) {
        cout << iter->display_card() << endl;
    }

cout << iter->display_card() << endl;

目前出现的错误：表达式必须具有指针类类型。

currently comes up with the "error: Expression must have pointer-to-class type".

同样，current_cards用以下声明：

Likewise, current_cards is declared with:

vector<Card*>current_cards;

此外，display_card（）方法简单：

Furthermore, the display_card() method is simply:

Card.cpp

string Card::display_card(){
    stringstream s_card_details;
    s_card_details << "Colour: " << card_colour << "\n";
    s_card_details << "Type: " << card_type << "\n";

    return s_card_details.str();
}

我查看了各种资源，问题没有为我工作。非常感谢您的帮助！

I have looked over various resources and everything that has been suggested for similar types of issues hasn't worked for me. Thanks for any help!

推荐答案

尝试：

cout << (*iter)->display_card() << endl;

* 由迭代器，在你的情况下是一个指针。然后使用 - > 解除引用该指针。

The * operator gives you the item referenced by the iterator, which in your case is a pointer. Then you use the -> to dereference that pointer.

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