Question

我刚开始用C ++学习类，我在下面的代码中得到了这个错误：conflicting declaration 'std::string PizzaOrder::toppings_offered'

有人可以在这里解释我的代码有什么问题吗？

class PizzaOrder
{
public:
    //all the toppings that are offered, constant array of strings
    static string toppings_offered[5];
    static double topping_base_cost;
};

string PizzaOrder::toppings_offered = {"onions", "bell peppers", "olives", "spinach", "tomatoes"};
double PizzaOrder::topping_base_cost = 0.50;

Answer 1

您忘记了toppings_offered是一个字符串数组，而不是字符串：

string PizzaOrder::toppings_offered[5] = {"onions", ... };
//                                  ^
//                                  |

（顺便说一句，我希望披萨订单订购配料，而不是提供它们。难道你的设计仍然有点混乱？）

Answer 2

string PizzaOrder::toppings_offered[5]

而不是

string PizzaOrder::toppings_offered

Answer 3

您必须在定义中使用与声明中相同的类型：

string PizzaOrder::toppings_offered[5] = { ... };

类型为string[5]，而不是string。

Answer 4

你不能这样做。您需要通过调用

来创建类的实例

PizzaOrder myPizzaOrder = new PizzaOrder();
myPizzaOrder.topping_offered {"","",""};

c ++类 - 冲突的声明错误

4 个答案: