Message in Chinese (Simplified) (中文(简体))
在不是定义类的实例的对象上不能调用友元函数。
Unlocalized message
Cannot call friend function on object that is not an instance of defining class.
Search by Google在不是定义类的实例的对象上不能调用友元函数。
Cannot call friend function on object that is not an instance of defining class.
Search by Google