c++ - C++中的重载运算符

Question

我想重载适用于此代码的“=”运算符:

void toArr(AVLNode<Student> student, Student* studentArr){
    int studentID = student.data; //This is where I want to use that operator
    ....
}

int operator=(int number, const Student& student){ //Error: 'int operator=(int, const Student&)' must be a nonstatic member function
    Student tmp = student;
    return (tmp.getID());
}

tmp.getID() 是一个 int。这可能吗？

仅供引用，我搜索了同样的问题，但没有找到带有 2 个参数的问题。

谢谢!

Answer 1

您需要在类 Student 中使用强制转换运算符来键入 int:

class Student
{
public:

    int id;
    int getID() const { return id; }

    operator int() const
    {
       return getID();
    }
};

Student student;
int id = student;