包括頭文件C++

Question

我有包含頭文件的問題。 在IObject提取我有錯誤： 「使用未定義的類型‘按鈕’的」

//IObject.h 
#pragma once 
#include "Button.h" 

struct IObject 
{ 
    void SendToMenu(Button sender) //ERROR 
    { 
     switch (menu_type) 
     { 
     case menu::game: 
      Game.AllButtons.push_back(&sender); 
      break; 
     } 
    } 
}; 

#pragma once 
#include "ButtonEvent.h" 

class Button sealed : public IObject 
{ 
public: 

    Button(Vector2f position, Vector2f size, string button_value, Color text_color, Color normal_color, Color pressed_color, menu menu_type) 
    { 
     this->position = position; 
     this->size = size; 
     this->button_value = button_value; 
     this->button_color = normal_color; 
     this->text_color = text_color; 
     this->active_background_color = pressed_color; 
     this->normal_background_color = normal_color; 
     this->ID = buttons.size() > 0 ? buttons.size() : 0; 
     this->menu_type = menu_type; 

     SendToMenu(*this); 

     buttons.push_back(*this); 
    } 

    ~Button() {}; 
}; 

Answer 1

按鈕應該要麼向前聲明或使用它之前定義。

退房Use of undefined type和When can I use a forward declaration?